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Selected Clients:

We solve real sales teams' problems


your sales performance

We will notify you via instant SMS as soon as the customer opens your proposal. DonÔÇÖt miss the best moment to get in touch with them, discuss the main aspects, resolve their doubts and help them with making a decision.


your customers

Find out who opens your proposal, which of its elements intrigued them the most and how much time they spent on a particular page. Analyse this information to work more efficiently.


your sales team efficiency

Make the right decisions at the right time. Thanks to detailed statistics and automated reports you can easily analyse and understand the activities of your sales team.

Understand your customers' needs and improve your sales process with Sellizer.

Increase the chances of successful sales even 9x more!

Try for free
Try for 14 days for free. No commitments

Understand your customers' needs with a simple to use sales monitoring tool. With Sellizer you will get to know your customers better and enhance the sales process understanding.

How does Sellizer work?

  • 1

    Send personalized proposals

    No more complicated implementations! You need only 30 seconds to send your proposal. With Sellizer you will smoothly attach all the important files and your customer will easily view them even on a smartphone. Quickly, safely and without a fear that your message will end up in the SPAM folder.

    You can easily direct all the sent proposals to your CRM.

  • 2

    Stay up to date with SMS notifications

    You will know who read your proposal. Don't waste time on unnecessary questions. Get in touch with customers who are currently viewing your proposal and help them make a decision. This will increase your selling chances even 9x more.

  • 3

    Analyse sent proposals

    Sellizer provides you with the essential data that will help to improve your proposals' effectiveness. Use it to increase selling chances. Create better proposals and get more customers.

They wrote about us:

Our ClientsÔÇÖ testimonials

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Sellizer made it possible for us to increase the pace of customer acquisition by 300% last year thanks to additional knowledge of how customers perceive our proposals. I strongly recommend it to anyone who wants to be more efficient in such a fast-changing business and new technologies environment!

Maciej Zag├│rowski

CEO Fabryka e-biznesu

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Thanks to Sellizer, I know which parts of my proposals are the most interesting for my customers - it gives me great basis to start a valuable conversation. I can also contact with clients in the best time - when they have my proposal right in front of them. Such combination made it so much easier for me to sell projects.

Damian Rams

Digital Analytics Consultant, DamianRams.pl

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We like clever solutions. Just like in Sellizer, we believe that the time of contact with the customer really makes a big difference, so we decided to integrate our tools. Thus, Sellizer user gets a SMS message about the opening of the proposal and statistics and recipients of their proposals can ask for contact via Callpage widget. Awesome!

Sergey Butko

CMO & Co-Founder Callpage

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Using Sellizer has improved our communication, both within and outside the company. In our internal communication, we use Sellizer to send important documents to ensure that they have not been skipped or missed among many other messages. Moreover, thanks to the use of the tool in communication with potential partners, we can see at what stage our relationship is.

Tomasz Świeboda

Managing Partner Inovo.vc

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LinkedIn is the most important channel for communicating with clients. Sellizer allows me to quickly and conveniently send presentations and proposals, and whatÔÇÖs most important, allows me to react quickly to their opening, analyse interest in them and consequently conduct valuable business conversations. I recommend.

Marcin Małaszuk

Ulam Labs

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Sellizer helps us respond to questions from our customers at the right time. Thanks to that we give added value already at the sales stage which allows us to build a relationship with the customer from the very beginning. This is very valuable to us.

Łukasz Białonoga

CEO LIKE.agency

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Although Sellizer can at first glance be seen as a tool only for sending proposals, I can certainly confirm that it also works for sending sales folders, contracts and other documents. Thanks to this, we have a real-time preview of what is the most valuable to the customer in each document (on which parts they spent most of the time) and what needs to be improved.

Michał Boniecki

COO JetSim & JetZone24

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Sellizer enables a thorough analysis of the customer in terms of interest in our proposal, which helps us save time in the further parts of sales process. When receiving information on how long the customer has been reading each pages of the proposal, I can predict whether the sales process will continue or our proposal is just a market recognition for statistical purposes of the potential customer.

Bartosz Makles

CEO DiSC Polska

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Sellizer has become an inseparable tool for us in communication on several levels. As an intermediary in the logistics industry, we come into contact with both operators and their customers. Sellizer allows us to work with both the first (reporting) and the second (sending proposals) Partners. Thanks to the systematisation and transparency of the activities in Sellizer, we have been able to significantly increase the rate of acquired customers.

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Until now, our knowledge has been ending at the stage of sending the proposal - and thanks to Sellizer - now this is the point where the acquisition of the greatest amount of knowledge about the client begins which allows the marketing team to understand better the needs and match the proposal content to the customers and sales team to contact the customers always at the right time. Thanks to the opportunities that Sellizer gives us, we can everyday increase our chances in a game called sales.

Michał Czuba

Marketing manager

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Very often we wondered why, despite sending a large number of proposals, many of them still remained unanswered. Thanks to Sellizer, we have structured our sales process, organized sending proposals and gained awareness of their quality. Now we can easily track which parts of our proposals are the most valuable for our customers and continuously improve them. I am pleased that with Sellizer we make better use of our time as well as the potential of our customers.

Grzegorz Jaskot


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We sincerely recommend Sellizer. It helps our sales team in daily duties and prioritizing customers. But that's not all. At the department level, it gives us the opportunity to improve the entire sales process based on easily measurable criteria.

Michał Drozda

Sales support manager


Discover the main features of Sellizer

SMS notifications
Sales analytics
Detailed reports
Automatic proposals sending

Who uses Sellizer


Don't waste your time on customers who don't open your proposals.


Scale the sales and focus on customers who really are interested in your proposal.


Work smarter. Send files and be sure that your customer opened the proposal.

Sales reps

Get in touch with the right customers and obtain more time to look for new sales' chances.

Sales managers

Find out how to develop your sales reps' abilities and improve the sales process.

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