A software developmentpartnerwho stays after the launch.

We work with founders and product teams across the whole life of a product: from the first scope to the release that brings the next funding round, and the years of growth after it.
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Vendors deliver tickets. Partners care what happens next.

A vendor builds what's in the spec and moves on. A partner asks why the feature matters, pushes back when the plan won't work and is still there when users, investors or the market change the roadmap. Our average partnership with SMBs and product companies lasts 5+ years, and 85% of our customers come back.

Why products outgrow their vendors

01

Every project starts from zero

A new vendor for each phase means re-explaining the product, the users and the history every time.
02

Nobody challenges the plan

Contractors build exactly what you asked for, even when a simpler option would ship sooner.
03

Knowledge leaves with the vendor

When the contract ends, so does the understanding of why the system works the way it does.
04

Strategy and engineering don't talk

Business goals live in one place, technical decisions in another, and the product drifts.
05

Growth breaks what launch built

The MVP worked for the first users, but scaling it needs people who know its shortcuts.
06

New tech, no one to ask

AI features, new platforms and integrations need advice from people who know your product, not a sales pitch.

What a long-term partnership looks like

Partnership is a way of working, not a contract type. It shows in how we plan, build and talk to you.

We think with you

  • Challenge scope that won't pay off
  • Suggest simpler paths to the same goal
  • Bring options, not just estimates

The same people

  • A core team that knows your product
  • Context kept from year to year
  • New people onboarded by those who stay

Built for growth

  • Architecture that survives success
  • Plans for the next stage, not just this one
  • Team size that follows your roadmap

Honest by default

  • Risks raised early
  • Clear trade-offs on cost and time
  • We say no when no is the right answer

Signs you need a partner, not a vendor

These usually show up once a product has users and a roadmap longer than one release.

1

You're on your third agency

Each switch cost months of onboarding and left code the next team didn't trust.

2

You make product calls alone

You want someone technical to think through trade-offs with you, not just estimate them.

3

Your roadmap spans years

Web, mobile, integrations and AI features are all planned, and they need to fit together.

4

Investors ask about the tech

Due diligence and board updates need a team that can explain architecture and plans.

5

You need to scale people up and down

Some quarters need a big team, others a small one, and you don't want to rehire each time.

6

Quality varies release to release

Without consistent people and process, each release feels like a gamble.

What we partner on

One product development partner for every stage

Product discovery

Business analysis, scope and a delivery plan before anyone writes code.

MVP development partner

A first version built to test the idea with real users and investors.

Website development partner

Web apps, portals and marketing sites built and kept up to date.

Mobile apps

iOS, Android and React Native apps, from first release to store updates.

AI development partner

AI features and ML models added to your product where they solve a real problem.

UI/UX design

Flows and interfaces that grow with the product and stay consistent.

QA

Manual and automation testing that keeps quality steady release after release.

Support and scaling

Maintenance, performance work and team extension when growth arrives.

Who is this for

For founders and teams in it for the long haul

Founders

You need a technical partner who helps decide what to build, not just how.

Funded startups

You're growing from MVP to a product with paying users and need a team that grows with you.

Product companies

You want one partner for new products, modernization and extra capacity.

SMBs

Software is core to your business, and you want a steady team behind it.

Where partners make the difference

Before a round

Get the product and the tech story ready for investors.

After a round

Grow the team and the roadmap quickly.

Adding AI

Decide where AI helps and build it properly.

New platforms

Add mobile next to web, or web next to mobile.

Scaling up

Keep the product stable as usage grows.

Modernizing

Replace aging parts without stopping the business.

How a partnership starts and grows

01

Get to know each other

We learn about your business, users, product and plans, and you learn how we work.

02

Discovery Sprint

A fixed-price two-week sprint that turns goals into scope, architecture and a plan.

03

First release

A team delivers the first milestone in sprints, with demos and shared tools.

04

Review together

We look at what users did, what worked and what to change next.

05

Grow the product

New features, platforms and team size planned quarter by quarter.

How we work

Ways to start a partnership

Discovery first

A fixed-price, two-week Discovery Sprint

Fixed price. Decide after.

For new products or new directions where the plan isn't settled.

Goals, users and scope defined

Architecture and tech choices

Design direction

Delivery plan and estimate

You decide what comes next

Start with discovery

Ongoing product team

most popular

A team that stays with your product

Monthly, team-based.

For products with users and a roadmap that keeps moving.

A core team that stays

Quarterly planning together

Design, engineering and QA

Team size that follows the roadmap

Regular reviews of results

Discuss a team

Partnerships that grew products

subscription app

Flight Tracker+ — iOS subscription app

USA
Global
59%
growth of active user base
Before
→
after
↓
Rating declining
↑
Revenue €200K → €1.2M in 6 months
↓
Revenue stagnating at €200K
↑
Stable weekly release cadence
↓
Legacy codebase, original team gone
↑
Architecture rebuilt
↓
No clear path to recovery
↑
Clear path for future growth
AI CONSUMER APPS

AI Mobile Editors

Global
4M+
DOWNLOADS COMBINED
Before
→
after
↓
Existing  codebase required stabilization
↑
Both apps stayed instore
↓
AI features broken or misleading
↑
AI rebuilt to production quality
↓
App Store compliance at risk
↑
App Store compliance restored
↓
Reviews declining fast
↑
Product stabilized 

Make the most of the experienced team

We are a global team of
creative
and
strategic thinkers
who specialize in building custom digital products
from scratch. Our main goal is to
deliver high-quality solutions
that meet our clients' needs.
We are a global team of
creative
and
strategic thinkers
who specialize
in building custom digital products
from scratch. Our main goal is to
deliver high-quality solutions
that
meet our clients' needs.
Learn more
85%
recurring customers
12M
the biggest fundraising round by one startup
X3 MRR
growth of partner's business in 5 mos
2 weeks
for project start
5+ years
av. partnership duration with SMBs and product companies

Why Gilzor

Most of our clients have worked with us for years. Partnerships like that are built one honest conversation at a time.

What we bring

Long partnerships

Average partnership with SMBs and product companies is 5+ years.

Returning clients

85% of our customers come back with new work.

Growth we've been part of

One startup we worked with raised a $12M round, and a partner's business grew MRR 3x in 5 months.

Track record

70+ products launched, 98% delivered on time.

Full product skill set

Strategy, design, web, mobile, AI, QA and support.

What makes us different

Referred, not sold

95% of clients come referred by business partners.

We push back

If a feature won't pay off, we say so and suggest an alternative.

Continuity

Core people stay on your product across years and phases.

Overlap with US hours

Teams in Warsaw and Limassol share part of the US working day.

Fast start

Work can start in about two weeks.

What our clients
frequently ask

What's the difference between a software development partner and a vendor?

A vendor delivers a defined scope and leaves. A partner works on your product over time, takes part in decisions, challenges the plan when needed and keeps the knowledge in one team.

Do you work with early-stage startups?

Yes. Many partnerships start with a discovery sprint and an MVP, then continue through funding rounds and growth.

Can you be our AI development partner?

Yes. We help decide where AI adds value in your product, then build and maintain those features with the rest of the product team.

How do you keep the same people on our product?

We plan teams around long engagements and don't move core people between clients without reason. When someone does change, the people who stay onboard the newcomer.

How is a long-term partnership priced?

Usually a monthly team, sized to your roadmap. New initiatives can start with a fixed-price discovery sprint. We'll suggest a setup after the first conversation.

What if our needs change?

That's expected. Team size, roles and focus change with your roadmap, and we plan those changes together.

No sales pitch

Tell us where your product is going

Share where the product is today and what's next. We'll suggest how we could help. If we're not the right partner, we'll say so.

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