RUBY ON RAILS UPGRADES

Upgrade an old Rails app without a rewrite.

For teams running a business-critical app on an outdated Rails or Ruby version. We audit the app, add tests around the paths that matter, and upgrade it one version at a time while it keeps serving customers.

Upgrade plan based on a codebase audit
One Rails version at a time, not a big-bang jump
Tests around critical paths before changes ship

10+ years in production · 20+ long-term partnerships

20,000+

Agents on a Rails platform we work on

10+ yrs

Shipping Rails in production

////WE’VETRUSTED BY

SOUND FAMILIAR?

Your Rails app works, but it is stuck on a version nobody wants to touch.

The app runs on a Rails or Ruby version that no longer gets security patches.
Gems are pinned to old versions because upgrading one breaks three others.
Hosting or tooling is forcing a Ruby upgrade you have been putting off.
There are few or no tests, so every change feels risky.
Someone has proposed a full rewrite and you are not sure it is justified.
New features take longer because the team works around old framework limits.

WHY CHOOSE STACKWORX

Rails is what we have shipped for 10+ years

Most old Rails apps do not need a rewrite. They need a careful upgrade by a team that reads the code before changing it.

Upgrade, not rewrite

A rewrite throws away years of business logic. A stepwise upgrade keeps what works and modernizes the framework underneath it.

Understand before changing

We map the data model, integrations, and risky areas of the app before the first version bump.

Long-term ownership

We stay on as the team that maintains the app after the upgrade, the way we do with long-term partners like Zentap.

WHAT YOU GET

A stepwise Rails upgrade, start to finish

01Core

Upgrade audit & plan

A written assessment of the current Rails and Ruby versions, gem dependencies, deprecations, and the order to upgrade in.

Version audit
Gem review
Upgrade path

Test coverage first

Tests added around checkout, billing, auth, and other critical paths so regressions show up before release.

Stepwise Rails upgrades

Move one minor or major version at a time, fixing deprecations as they appear, instead of one risky jump.

Ruby & gem updates

Ruby upgraded alongside Rails, and outdated or abandoned gems replaced or updated.

Safe deploys

Small, reviewable releases with error tracking and monitoring so problems surface before users report them.

Ongoing maintenance

After the upgrade, the same team keeps the app current so it does not fall behind again.

32M+
Transactions processed
20,000+
Agents on our platforms
20+
Long-term partnerships
10+ yrs
In production

Proof · Zentap

A Rails platform serving 20,000+ real estate agents.

Zentap is a real estate marketing platform built on Rails, PostgreSQL, and API integrations. We work on it long-term, keeping listing data aligned with current market data and the platform reliable at scale.

20,000+agents on the platform

Book a Discovery Call

HOW IT WORKS

From an outdated Rails version to a current, maintained app.

01
Discovery call
A 45-minute call on the app, its current versions, and what is blocking you today.
02
Audit & plan
We review the codebase and dependencies and agree on the upgrade order and what to test first.
03
Upgrade in steps
Each version step ships as a small, tested increment while the app stays live.
04
Keep it current
We maintain and extend the app long-term so the next upgrade is routine.

WHAT CLIENTS SAY

Partners, not vendors

Great experience! The communication was clear and professional.

justonbruen

Fiverr client, United States

Fiverr review

RELATED GUIDES

FAQS

Frequently asked questions

Can you upgrade an old Rails app without a rewrite?

Yes. We audit the app, add tests around the paths that matter, and upgrade it one version at a time while it keeps serving customers. A rewrite throws away years of business logic; a stepwise upgrade keeps what works and modernizes the framework underneath it.

How do you plan a Rails upgrade?

We start with a written assessment of the current Rails and Ruby versions, gem dependencies, deprecations, and the order to upgrade in. Then we agree on the upgrade order and what to test first.

Do you upgrade Ruby and gems as well as Rails?

Yes. Ruby is upgraded alongside Rails, and outdated or abandoned gems are replaced or updated.

Does the app stay live during the upgrade?

Yes. Each version step ships as a small, tested increment while the app stays live, with error tracking and monitoring so problems surface before users report them.

Stuck on an old Rails version? Let's map the way forward.

Book a 45-minute Systems Discovery Call. You leave with a clear view of the upgrade path and what to do first, whether you hire us or not.

Book a Discovery Call

Upgrade an old Rails app without a rewrite.

Get a Rails upgrade plan

Your Rails app works, but it is stuck on a version nobody wants to touch.