Lead handling (pre-sales)
Virtual qualification and meeting booking
Classic training
Training on a virtual sales process
CRM implementation
AI in sales implementation
Charity activities
#1
Sales House
in the World
We take sales teams to a whole new level. We build effective sales funnels, develop sales skills and implement proven tools. We generate B2B leads that give our clients room to grow.
Last month at Sales House · October 2026
- 8,000,000email messages
- 30,000LinkedIn invitations
- 750posts and videos
- 4,100new leads
- 45+EUR millionvalue of client offers
- 4.5+EUR millionvalue of client contracts
What we do
We support your entire sales funnel
Choose a funnel stage and see how we help at each one.
01
Visibility and brand
We build the visibility of your company and its leaders on LinkedIn.
LinkedIn MarketingWe build your leaders’ personal brands: content, video and regular publishing.See the service 
Employee AdvocacyConsistent employee profiles and a shared content calendar for the whole team.See the service 
LinkedIn profile auditWe review the profile element by element and recommend changes.See the service 02
Lead generation
We reach decision-makers by email and on LinkedIn. You get hot leads.
Cold MailingPersonalised email campaigns. A team, databases and our own sending infrastructure.See the service 
Social SellingA salesperson runs your LinkedIn profile, builds relationships and books meetings.See the service 
B2B company databasesCustom company databases from registers, maps and thousands of sources.See the service 03
Lead management
We qualify leads and turn them into booked meetings.
04
Sales management
We organise your sales process and manage your team.
Sales department transformationThe SalesBooster programme rebuilds your process, CRM, training and team habits.See the service 
Remote sales directorAn experienced director manages your sales department remotely.See the service 
Open consultingAn individual development path, mentoring and support with your challenges.See the service 05
Skills development
We develop salespeople in the training room and on a virtual sales process.
06
Tools and CRM
We implement CRM and AI that support salespeople’s everyday work.
See how it works in practice
Watch and listen to the live presentation
Trusted by 1,700 companies from Poland and around the world
Online presentation
Find out how we can help you
Swipe through the slides like a presentation and see how Sales House works for your sales.
Arrows, swipe or click a thumbnail
Voice-over script for this slide
Meet InStream Group, the first Sales House in Poland. In a few minutes we will show you how we can take responsibility for your company's sales. You will also learn why more and more companies choose this model of cooperation.
Software houses changed the way companies build technology. Today the same is happening in sales. When artificial intelligence gives everyone similar tools, the advantage goes to whoever sells better. Sales House gives you that advantage from day one.
Companies come to us with very different challenges. Some need new conversations with clients, others are entering a new market or building a team from scratch. They all have one thing in common: they want to grow faster without adding headcount.
When marketing, leads, CRM and training come from different companies, nobody looks at sales as a whole. At Sales House one team is responsible for the entire funnel. We are accountable to you for one goal: sales growth.
Building a sales department from scratch takes months of recruitment, onboarding and costs before the first results appear. With Sales House you get a team that delivers from the first month. You adjust the scale of cooperation to your company's needs.
We can step into one stage of your funnel or take over the whole of it. At every stage, experienced specialists supported by artificial intelligence do the work.
Every service we offer rests on the same foundation. You get people, proven know-how and InStream's own technology. That way you don't pay for experiments – you use solutions proven in our clients' projects.
Everything we do has one goal: the success of your sales. In a moment you will see how we build visibility and win clients. We usually discuss developing the sales process and team at a separate meeting.
Before a client talks to you, they check you out online. More and more often they also ask artificial intelligence about experts. That is why we build your leaders' brands so they are visible on LinkedIn, in Google and in AI answers.
For us, content means many formats: from posts to videos with your experts. We agree the style and formats together at a creative meeting. We prepare every creative in line with your company's brand book.
A dedicated specialist and a support team work on your brand. We plan content, run activity and build relationships on your behalf. You see everything in the Lead Astra platform. Nothing is published without your approval.
A personal brand is an investment that pays off more every month. First, visibility grows. Over time it translates into better conversion and enquiries from new clients.
We expand the network, build the position of brand leaders and achieve top results. Some of our clients are number one in their segments for LinkedIn recognition. You will find full case studies and video testimonials on our website.
LinkedIn Marketing is a subscription from €1,000 net per month. We write the minimum publishing scope into the contract, so you know exactly what you are paying for. If you want to involve the whole team, we extend the service with Employee Advocacy.
Cold Mailing 2.0 is a way to get a steady stream of new leads at scale. We write short, human messages to the people who really make purchasing decisions. Every campaign is run in compliance with GDPR.
You cannot build this scale on your own. We work in over 40 markets. Our campaigns bring clients 4,000 leads a month. Your campaign uses the same infrastructure and experience.
Your campaign is run by an experienced Project Manager with a support team. We take care of databases, content, infrastructure and the legal side. You receive ready replies in the Lead Astra panel, integrated with your CRM.
Every month you receive a report comparing the results with the guarantee written into the contract. In a well-set-up campaign the number of Hot Leads grows month after month. You will find case studies from such campaigns on our website.
Cold Mailing 2.0 is a subscription from €1,700 net per month, with no limit on campaigns or mailboxes. We guarantee the minimum number of Hot Leads in the contract. You can also choose a model in which you pay only for Hot Leads.
You won't reach your most important clients with a mass message. In Social Selling a person leads the conversation with the decision-maker, from first contact to the meeting. That is how we build relationships that cannot be automated.
Conversations are led by an experienced LinkedIn salesperson supported by our team. We look after your network and the history of every relationship. The Lead Astra platform prepares the work, but every message is sent by a person.
You also see Social Selling results in your monthly report, compared against the guarantee in your contract. We have worked with many clients for years. Relationships built on LinkedIn keep paying off long after the first conversation.
Social Selling is a subscription from €1,000 net per month. We write the minimum number of invitations and Hot Leads into the contract. Conversations are run from your experts' profiles.
Our cooperation has a steady rhythm. The first month is preparation, then we launch campaigns and analyse the results every month. Every 90 days we meet to plan the next stage. We also prepare your team to work with the leads.
The best results come from combining three channels. Visibility on LinkedIn makes clients more willing to reply to emails and messages. That is how Lead Generation 3.0 is born: a steady flow of conversations with your clients.
1,700 companies from more than 40 countries have already trusted us, from startups to global brands. Every month we run more than 200 sales projects.
Let's talk about how we can grow sales in your company. Call or write to us. You will find our contact details on the screen.
Hello. We can't meet in person, so I'm happy to take you through Sales House step by step. InStream Group is the first Sales House in Poland. We support your company's entire sales: from brand visibility, through winning clients, to developing your sales department. Our goal is the growth of your business.
For the last twenty years, companies have scaled technology with a partner – a Software House that gave them developers, tools and proven ways of working. Today artificial intelligence makes it possible to build technology in a very short time. The advantage now comes from sales and marketing. Just as companies once scaled technology, today they scale sales with a partner. That is why the era of the Sales House has begun.
When is it worth turning to a Sales House? When you have a good product and need more conversations with clients. When you want to build brand visibility or enter a new market. When you want to turn client interest into sales faster. When you are building or rebuilding a sales team. And when you want to scale sales without adding headcount. In each of these situations we take over the part of the funnel you need.
Until now, companies have grown sales with many suppliers at once: a marketing agency, a lead provider, a CRM implementation company and a sales trainer. Each was responsible for its own piece. Sales House brings all of this together in one partner: one strategy, people, knowledge and technology in one place, and shared goals. We are responsible for what matters most – the growth of your sales.
Your own sales department is much more than salaries. It means recruiting and onboarding people, tools, licences and databases, training, your time spent on management, team turnover and months of ramp-up. With Sales House you get all of this in one cooperation: a ready team, proven know-how and technology from day one. You change the scale of support as your needs change. You pay for a ready sales department, not for building one from scratch.
We support you at every stage of the sales funnel. We build the visibility of your brand and its leaders. We reach the companies you want to talk to. We turn interest into meetings and sales opportunities. We organise your sales process, CRM and tools. We develop your team's skills. You can start with one stage or entrust us with the whole funnel. At each stage an experienced team supported by artificial intelligence does the work.
The first area is visibility and brand. Your personal brand is one of the most important investments today. We build it systematically on LinkedIn: for the owner, salespeople and experts, or for the whole company in the Employee Advocacy model, where all employees speak with one voice. You gain recognition, trust and visibility, including in AI-powered search engines. You have the knowledge and experience. We make sure the market notices it.
We run all brand work on our own platform. We feed it with knowledge about your company, and on that basis we create posts, graphics, carousels and short videos. You see the content plan in a calendar, approve every post before publication and can check at any time what has already been published. You focus on the business while we make sure your brand is regularly present online.
The second area is winning clients. We specialise in the two methods that work best today. Cold Email 2.0 means short, business-like messages sent to carefully selected companies. LinkedIn Sales means conversations with decision-makers run manually, with text and voice messages. You set the goals and the target group, and we build a channel that regularly delivers meetings. We operate in more than forty markets: in any country, region and industry.
LinkedIn Sales is social selling done one hundred percent manually. Every conversation is led by our salesperson, on your behalf and in your tone, without bots or automation. We reach specific companies and people from your list, often at board level. When the recipient doesn't reply, we send a voice message prepared from a sample of your voice. The recipient hears you talking about their company. Your profile builds trust before the question about a meeting is asked.
Cold Email 2.0 is a personalised business message sent on behalf of your salesperson to a decision-maker. Its goal is to start a conversation. We build the database exclusively for you, based on hundreds of company and person attributes. Every recipient gets a message tailored to their role and industry, and no message goes out without your approval. We take full responsibility for the technology and GDPR compliance.
You see every sales opportunity in real time. Interested people go straight to your client panel, together with company details, phone number, email address and the content of their reply. For each contact you see the stage of the conversation: from the first reply to a win. Analytics show which industries and markets respond best, so every month we develop the strategy where results are highest. You know who we are talking to on your behalf and what comes of it.
A lead is only the beginning. We help turn it into a client. We prepare conversation scenarios, scripts and best practices. We select and implement a CRM system for your sales process. When you are short of hands, we give you trained specialists to support your team. Together we analyse leads and work to make sure as many of them as possible end in a sale.
Before the first leads arrive, we prepare your team to work with them. On the PipeChamp platform salespeople have a sales academy with video courses and sessions with a virtual trainer. They practise conversations with a virtual client before calling a real one. Together with you we build sales skills: we prepare the first conversation with the client and lead-nurturing sequences. That way the lead reaches a team that knows how to run the conversation.
If you need more hands, you can hire our pre-sales specialist, an SDR. This is a trained salesperson who calls leads, qualifies them and books meetings for your team. They work in your CRM system or in ours, so you see every activity. You don't recruit or train, and you change the scale of support as needed. Your team focuses on closing sales.
The next area is team development – the Sales Booster programme. Real change in a team requires a plan, resources and support during the transformation. That is why we take your team through four phases. We design the sales process. We implement it together with the CRM. We practise and change salespeople's habits. Finally, we develop the leaders. A consultant eventually finishes the job, but the process, knowledge and platform stay in your company for good.
The result of the programme is a healthy sales culture. It rests on four pillars. A sales process that from now on is the foundation of the team's work. Consistent communication, so salespeople know how to talk to the client at every stage. Conscious management, where leaders work with numbers and support everyone's development. And a ready working environment with CRM and tools. This is how the best sales teams in the world are built.
PipeChamp is our platform for developing sales teams. We record your sales process in it, so every salesperson knows what to do at the next stage of the conversation with the client. The team practises conversations with a virtual trainer, and the leader sees each person's progress and knows where support is needed. New salespeople get up to speed faster and the whole team works to one standard. The platform stays in your company.
How does it work? All our services are built on three layers. Technology: our own systems at every stage of the funnel, which you get access to. Resources and know-how: databases, ready processes, scripts and knowledge of what really works in sales. People: a dedicated team of specialists. That way you don't have to learn sales from scratch or build everything yourself. That is what makes a Sales House different from an ordinary agency.
Behind every project there are people. We have more than seventy specialists in twelve specialisations. They are project managers and strategists, cold mailing and social selling specialists, data analysts and copywriters, LinkedIn marketers and content creators, meeting-booking specialists, CRM consultants and sales trainers. For your project we select a dedicated team with the skills you really need.
We tailor the cooperation to your company. You can hire the full resources of Sales House: a dedicated team, know-how and technology. You can order a ready one-off solution, for example a sales process, a CRM implementation or team training. You can also buy a licence for our own platforms, Lead Astra and PipeChamp, for your team to use independently. You change the model as your company grows.
In the full-resources model you always get three layers together. People: a project manager, a data analyst, a creative department, technical and legal specialists and a sales trainer. Resources and know-how: databases, ready processes and scripts, any number of campaigns, target groups and markets, and a sales academy. Technology: CRM and a client panel, unlimited domains and mailboxes, cold mailing and LinkedIn platforms, and AI-based tools. You don't build anything yourself. You get a ready, working sales department.
How do we start working together? First we talk and get to know your business, clients and sales goals. Then we prepare a strategy for the first ninety days: we decide which area we start with and how we measure results. Then we launch with a dedicated team. We meet regularly to analyse results together and plan the next steps. We work with the mindset that every month should be better than the last.
InStream Group is the first Sales House in Poland. For ten years we have supported B2B companies in sales: from startups to international corporations. We have more than seventy specialists, operate in more than forty markets and have delivered more than three thousand projects. We build our own technology and share the knowledge gained in each of them.
The largest companies in the world, startups, local Polish businesses and industry leaders have trusted us. We have worked with many of them for years, because trust is built on results. Every month hundreds of companies and sales teams in Poland and around the world use our support.
We operate in more than forty markets worldwide: in Europe, North and South America, the Middle East, Asia-Pacific and Africa. We match the campaign language to your team. Poland is our base, and we look for clients wherever you want to sell.
Want to find out more? Click the Virtual Demo button in the menu at the top of the page and talk to our virtual consultant. It's like a video call: you tell them about your sales and the consultant shows you how Sales House can help. At any time, without booking a meeting. If you prefer to talk to a person, our consultants are waiting for you.
InStream Group. The first Sales House in Poland. You build the rockets. We launch them into space.
Clients and their stories
Our clients' success and satisfaction matter most to us. Join more than 1,700 companies worldwide for which we have generated leads.
Case study
Emitel × InStream
Cold Email campaign: boosting in-building mobile network coverage.
105 hot leads350% of the guarantee deliveredClient testimonial
Mr Staff Support
Recruitment of drivers and workers from Asia. Magdalena talks about working with InStream.
Case study
Studio201 × InStream
Cold Email campaign for a software house: apps and AI implementations.
119 hot leads3 signed contractsClient testimonial
Packon
Cardboard packaging manufacturer. Konrad Wijata talks about working with InStream.
Case study
Personal System × InStream
Cold Email campaign for a permanent and temporary staffing agency.
40 hot leads in 3 months17,000+ messagesClient testimonial
Proexwork
Staffing agency. Maciej Krutul talks about working with InStream.
Case study
StethoMe × InStream
LinkedIn: the CEO's personal brand and US market outreach in 4 months.
607 invitations13.5% acceptance rateCase study
Iguana Group × InStream
Cold Email campaign to schools: sports equipment.
43 hot leads419 repliesClient testimonial
HSK Consulting
Employee hiring services. Jarosław Multan talks about working with InStream.
Client testimonial
MAAG Gear
LinkedIn campaign, 2 years of working together. Krzysztof Orłowski talks about working with InStream.
1–2 of 10
Client stories
See how we help companies like yours
Testimonials, case studies and campaign results from our clients in Poland and around the world.
See client storiesWe did the maths for you
Wondering whether to build sales yourself
or use the support of specialists?
Your own sales department is more than a salesperson's salary. It means recruitment, systems, a working environment and months of waiting for results that nobody guarantees. Sales House brings all of this from day one.
How many specialists work on your sales
For roughly the cost of one salesperson
over a dozenpeople in the Sales House team
Your own department
1 salesperson — full-time salary
Sales House
- Human resources
- Sales systems
- Tools
- Consultants
- CRM
- Lead generation platforms
What effective sales needs
PeopleSystemsEnvironmentResults
Building it yourselfeverything on your side
PeopleYou recruit, onboard and retain a salesperson. Holidays, sick leave or a resignation stop sales.
SystemsYou buy and configure the CRM, contact databases and sending tools yourself.
EnvironmentYou build the process, scripts, training and management from scratch, learning from your own mistakes.
ResultsYou pay from day one, while the timing and scale of the first results are unknown.
With Sales Houseone partner, every area
PeopleA ready team: strategy, copywriting, campaigns, pre-sales and consultants.
SystemsTechnology, databases and CRM included. More than 250 CRM implementations behind us.
EnvironmentProven processes from more than 3,000 projects and more than 10 years on the market.
ResultsA minimum number of hot leads written into the contract in lead generation projects.
Check it for your own case
We will calculate what your own sales department would cost you
In a conversation with an expert we will compare the cost and time of building your own team with the Sales House model for your company.
Get a behind-the-scenes look at our services
Five short videos about how Sales House works for clients: from the first contact with a decision-maker to transforming an entire sales department.
What does a Sales House do?
A Sales House takes over a company's B2B sales, from brand visibility and booking meetings to developing the sales team's skills.
Cold Email — lead generation
Cold Mailing 2.0 campaigns on contact databases built for the client's offer. The result is meetings with decision-makers from their target group.
LinkedIn Marketing
A recognisable company brand on LinkedIn and experts who attract clients. Salespeople start from warmer conversations.
LinkedIn Social Selling
Salespeople build relationships with decision-makers on LinkedIn and turn them into sales conversations.
Sales Booster — sales department transformation programme
A programme that organises the sales process, bases decisions on CRM data and develops salespeople's skills.
Products and technology
Sales House means our own products and technology
Our services are backed by our own platforms and tools. Swipe through the cards and watch a short video about each one.
Service01/ 06
LinkedIn Marketing
Company and expert brand on LinkedIn: strategy, posts and videos that build trust before a salesperson calls.
Watch the videoService02/ 06
LinkedIn Sales
Salespeople who open conversations with decision-makers on LinkedIn themselves, with our platform and team behind them.
Watch the videoService03/ 06
Cold Mailing
Cold email campaigns to B2B decision-makers in Poland and abroad, with a guaranteed minimum number of hot leads.
Watch the videoProduct04/ 06
Lead Astra
An AI-supported system for smaller companies: contacts, campaigns, LinkedIn and CRM in one place.
Watch the videoProduct05/ 06
PipeChamp
A virtual training ground for sales teams: the company designs the process and salespeople practise it.
Watch the videoProduct06/ 06
01 / 06
Manifesto · CEO Filip Duszczak
The era of the Sales House has begun
We all feel excited. Thanks to artificial intelligence we want to build newer, better and more efficient solutions. But we all feel uncertain too. We don't know what will happen or how to prepare for what is coming.
I believe that if you trust my team, we will do everything so that your organisation not only grows its sales but also feels safe and confident. We make mistakes like everyone. But we believe that honesty, quality and full commitment are the foundations of cooperation.
We know sales. You know your business. Together we can create a healthy sales culture in your organisation and scale your sales team.
I trust my people completely.
Trust me.
Filip Duszczak
CEO and founder of InStream Group
Client testimonials
We recommend InStream Group as a trusted partner for delivering effective sales support and lead generation.
InStream Group helped us target our exact audience and finding B2B companies representatives. We are pleased with the fruit of this cooperation and will gladly recommend it to others.
We recommend cooperation with InStream Group in the field of sales support and lead generation.
We recommend InStream Group as a trusted partner for delivering effective sales support and lead generation.
We recommend InStream Group as a trusted partner for delivering effective sales support and lead generation.
We recommend InStream Group as a trusted partner for delivering effective sales support and lead generation.
InStream Group has proved to be a competent partner in building business relationships and expanding our sales activities. Their work is precise and delivers high-quality leads.
Choose a partner you can count on
We have been generating B2B leads and building sales teams for over 10 years.
We have supported more than 1,700 companies
worldwide in sales.
We have supported more than 1,700 companies in sales
Our own proprietary
technology
Full legal support
Contact us
Specialist
Amanda Kostek
Phone
+48 726 302 077
Specialist
Paweł Marek
Phone
+48 726 101 280Syntia Godlewska
Phone
0048 665 624 095
Specialist
Kinga Sroczyńska
Phone
0048 720 775 439Monika Purchała
Phone
0048 459 568 441Specialist
Monika Purchała
Phone
0048 459 568 441
Specialist
Magdalena Kwiatkowska
Phone
+48 603 306 237Media about us
In the media
Sales House and InStream Group in the business media.
- 28.10.2026The world's first Sales House is being created in Poland. Is this a new era for Polish B2B services on global markets?Read the article
- 28.10.2026A modern sales department or a Sales House? How to secure effective sales in 2027Read the article
28.04.2018An industry with trillions of dollars flowing through it needs salespeopleRead the article
Our Impact
We are changing the world for the better
We support children, young people and seniors in our area. See what we do together with the team beyond sales.
Invest in your sales team
Fill in the form. We'll get back to you within 10 minutes.