At some point in every EdTech company's growth, an engineer says, "We could build our own editor."
The reasoning sounds solid. Open-source editors are free. You get full control. You can customize exactly what you need.
Six months later, that engineer is maintaining a cross-browser text rendering engine.
So, they don’t waste time anymore building the features that make your LMS valuable.
This article breaks down the true cost comparison between building on an open-source rich text editor and adopting a commercial solution.
Additionally, it also draws specific attention to the long-term total cost of ownership (TCO).
In fact, you will also get to learn a lot about security and feature velocity.
Key Takeaways
- Building an open-source fork drains roughly $126,000 over three years in direct engineering time compared to a fraction of that for commercial licenses.
- Maintaining a custom cross-browser text rendering engine requires 10 to 20 hours per month of unplanned reactive work that directly delays core roadmap features.
- Managing security patches for XSS vulnerabilities in an open-source fork introduces significant FERPA compliance risks and deployment bottlenecks.
- Commercial editors reduce integration time from several months to a few days while handling browser compatibility and performance optimization automatically.
- Rolling your own solution only makes sense if the editor itself is your primary product rather than a supporting infrastructure layer.
What Are The Two Divisions Of A Rich Text Editor?
The pathways of a rich text editor are divided into two major sections. Let’s see what they are:
The "Build" Path: What It Actually Involves
Most teams that "build" a rich text editor don't write one from scratch.
This feels like a shortcut, but it creates a distinct set of costs that compound over time.
1. Initial Integration: 2-6 Months
Open-source editors provide a foundation, not a finished product. So, your team needs to build the toolbar UI.
In addition, you must also implement paste handling for Microsoft Word and Google Docs.
Also, you need to add image upload and management.
After you are done with these, your next steps will be to:
- Create table editing functionality
- Configure HTML sanitization for security
- Design the mobile editing experience
The engineering salary data from Levels gives us striking information. FYI, a mid-senior frontend engineer in the U.S. costs approximately $150,000-$200,000 annually, including benefits.
If that engineer spends four months on editor integration, the initial cost is $50,000-$67,000 in engineering time alone.
Also, they must keepin mind that they're not building anything else during that period.
2. Ongoing Maintenance: 10-20 Hours Per Month
Browser vendors ship updates continuously. Chrome's release schedule delivers a new version roughly every four weeks.
Your editor fork needs to be tested against every browser update. When something breaks (and it will), someone on your team needs to diagnose and fix it.
We call it reactive, unplanned work. It interrupts sprint cycles and delays roadmap items.
For EdTech platforms specifically, you also need to maintain compatibility with institutional browsers.
Many universities standardize on specific browser versions. In addition, some K-12 districts use managed Chromebooks with delayed update cycles.
So, I am sure that your editor needs to work across this range.
3. Security Patching: High Stakes, Unpredictable Timing
Rich text editors handle user-generated HTML. That makes them a target for cross-site scripting (XSS) attacks.
Additionally, the OWASP Top 10 lists injection attacks as a persistent web application risk. Also, the rich text editors are a common vector.
When an XSS vulnerability is discovered in your editor's upstream open-source project, you need to evaluate the patch.
Additionally, you must also merge it into your fork (resolving any conflicts with your customizations).
In turn, test it across your supported browsers and deploy it.
If you've diverged significantly from the upstream project, merging patches can take days.
For EdTech platforms handling student data protected by FERPA, a delayed security patch carries compliance risk beyond the technical vulnerability itself.
The "Buy" Path: What It Actually Costs
Commercial rich text editors charge a license fee in exchange for a production-ready product with ongoing maintenance, security updates, and support.
1. License Cost
Commercial editors typically charge annual license fees. It starts at a few hundred dollars for basic plans. Additionally, it scales to a few thousand for enterprise features.
Also, you must compare this to the $50,000+ in engineering time for initial integration of an open-source fork.
Then, you will see that the license fee is a rounding error.
The relevant comparison is not "free vs. paid." It's "your team's time vs. the vendor's team's time."
When you buy, the vendor's engineering team handles browser compatibility, security patches, performance optimization, and feature development. Your team focuses on your product.
2. Integration Time: Hours To Days
A commercial editor with dedicated framework wrappers and production-ready features integrates in hours, not months.
Paste handling, table editing, image management, mobile support, and HTML sanitization come built in. Your team configures rather than builds.
There are certain EdTech-specific requirements like:
- Math equation support
- Track changes
- Collaborative editing
For these, the commercial editors offer tested integrations with tools like MathType and real-time collaboration plugins, and as for students with dysgraphia or motor challenges, pairing in a math writing software removes the handwriting barrier entirely.
Building these integrations from scratch on an open-source foundation adds months to your timeline.
3. Ongoing Maintenance: Near-Zero
With a commercial editor, browser compatibility testing, bug fixes, and performance improvements are the vendor's responsibility.
Your team's maintenance burden drops to applying version updates. Now this should be low-friction.
But it will only happen if the vendor provides clear migration guides. Also, he has to maintain backward compatibility.
What Are The Components Of A Three-Year TCO Comparison?
Here's a simplified comparison for an EdTech platform with a five-person frontend team.
1. Open-Source Fork Path
Initial integration costs four months of one engineer's time, roughly $60,000.
Ongoing maintenance runs 15 hours per month at $85 per hour (loaded cost), totaling $15,300 per year.
Security patch response averages 20 hours per quarter at the same rate, adding $6,800 per year.
Opportunity cost from delayed features is harder to quantify, but real. Over three years, direct costs alone total approximately $126,300.
Additionally, the engineer hours lost to editor maintenance could have shipped two to three significant product features.
2. Commercial Editor Path
License costs run $1,000-$2,000 per year, depending on plan and deployment model.
Initial integration takes two to five days of one engineer's time, roughly $3,400-$8,500.
Ongoing maintenance is limited to applying updates. So, it is estimated at two hours per quarter.
Additionally, it totals $680 per year. Over three years, direct costs total approximately $10,000-$16,000.
The difference is roughly $110,000 in direct engineering costs over three years.
In addition, you will see that the real value is in the features your team ships. It is not in the editor's work that they avoid.
Making The Decision For The Rich Text Editor
Ask your team three questions. First, how many engineering hours did we spend on editor-related work in the last six months?
Second, what features would we have shipped with those hours? Third, what is our editor's current XSS vulnerability exposure?
In addition, you must also ask, how quickly can we patch it?
If the answers to these questions make you uncomfortable, the build vs. buy decision has already been made.
But the only remaining question is how quickly you can make the switch.
