Build modern editing and collaboration faster

Keep your team focused on the roadmap — while we handle the complexity
Book a call
“You’ve been doing some really hard technical work that we wouldn’t have been able to do. The partnership has been great — you’ve been amazing to work with”
Jay Nath
Problem

Why this matters

01
Your editor is the core of your product experience
It’s where your users spend their time — and it shapes how they see your entire app
02
Competitors are moving faster
Modern editing and collaboration are no longer optional; they’re expected. Teams that ship them quickly set the standard
03
You need a foundation that lasts
Shortcuts burn time and budget later. The right architecture scales with your vision, without slowing your team down
Solution

Here’s how we help

Own the complexity
Your engineers aren’t editor experts — and they shouldn’t have to be. We handle the architecture, internals, and edge cases of frameworks like Tiptap, CKEditor, and Slate, so your team can stay focused on the product
Ship faster
We build and integrate fully custom editing solutions — from AI-assisted workflows to structured content, real-time collaboration, diffing, versioning, and more — all without blocking your roadmap
Future-proof your foundation
Avoid costly mistakes. We help you choose and implement the right architecture now, so you can scale your editing experience as your product grows

Flexum builds and migrates advanced content editing stacks for complex SaaS apps

Proven in complex domains
We’ve built and migrated advanced editing stacks across legal tech, knowledge management, compliance, and reporting tools
Fast, flexible delivery
We plug in where you need us — auditing setups, building from scratch, or laying future-proof foundations with speed and quality
Work with the best frameworks
Our professional partners
Professional partner
Professional partner

Our services

Autonomy

Outsource your editor — not your control

In most SaaS apps, the editor is a self-contained unit. We take full ownership of this component — designing, building, and maintaining it independently, so your team stays focused
Acceleration

Plug in senior experts to ship faster

Your team is already deep in editor development, but the backlog is growing. We jump in alongside your engineers to accelerate delivery — with deep editor expertise and zero onboarding friction
Evolution

Safe migration from legacy stacks

You’ve got years of user content in a legacy editor — and new features aren’t feasible on it. We help you migrate to a modern, maintainable stack without risking your data or UX

Case studies

How we built Distribute’s complex custom editor—and helped them launch faster, with a scalable foundation for growth

View case study
Read full case study
Coming Soon

How a public-sector platform turned complex public-sector document workflows into a seamless, collaborative authoring experience

View case study
Read full case study
Coming Soon
More case studies

Top features we can implement into your app

We design and deliver custom text editor, real-time collaboration, and artificial intelligence features that drive sales and outpace the competition.
Get more inspiration
Slash commands
Slash commands let users type shortcuts to format text, insert elements, or trigger actions instantly
Drag-and-drop block editing
Drag-and-drop editing allows users to reorganize text, images, or layouts by simply dragging blocks
Real-time collaboration and editing
Real-time collaboration lets multiple users work on the same project at the same time, with everyone seeing updates instantly
Avatars, live cursors, live selection, carets
This feature shows who’s online with live avatars, cursors, and selections, providing real-time visibility of user activity
Automated AI summaries
AI-generated summaries highlight key updates in your workspace—like completed tasks, new comments, or recent changes
AI writing assistant / copywriter
An AI writing assistant helps users create and edit content effortlessly, from drafting emails to writing reports
Slash commands
Slash commands let users type shortcuts to format text, insert elements, or trigger actions instantly
Drag-and-drop block editing
Drag-and-drop editing allows users to reorganize text, images, or layouts by simply dragging blocks
Real-time collaboration and editing
Real-time collaboration lets multiple users work on the same project at the same time, with everyone seeing updates instantly
Avatars, live cursors, live selection, carets
This feature shows who’s online with live avatars, cursors, and selections, providing real-time visibility of user activity
Automated AI summaries
AI-generated summaries highlight key updates in your workspace—like completed tasks, new comments, or recent changes
AI writing assistant / copywriter
An AI writing assistant helps users create and edit content effortlessly, from drafting emails to writing reports

How to work with us

We’re flexible in how we engage — from short, scoped projects to long-term product partnerships. Start small or go deep — whatever makes the most sense for your team right now
Fixed-scope project
A low-risk way to start working together. We prototype, migrate, or implement a clearly defined editing feature — fast, with no surprises
Perfect for proving the value of custom editing before committing to deeper integration
Ongoing collaboration
For larger scopes or long-term initiatives, we integrate fully into your team — providing engineering firepower, architectural oversight, and UI/UX support.
We work as part of your product delivery process, with regular planning, async updates, and full accountability
Myron is a software veteran with 15+ years in product engineering. Alongside co-founder and UI/UX expert Anton, he’s helped dozens of SaaS teams turn their editing systems into strategic product assets
Book a call
Prefer email?
hi@flexum.io

Let’s build together!

SaaS leaders like Distribute and Authorium partner with Flexum to ship advanced editing and collaboration features faster — without draining their teams or slowing their roadmap
Book a call
Reviewed on
Clutch Logo
Star RatingStar RatingStar RatingStar RatingStar Rating
Professional partners
Professional partner
Professional partner
hi@flexum.io
© 2025 Flexum, Inc. All rights reserved.
Terms of servicePrivacy policy