Is Eraser.io worth the price?
Eraser fills a specific niche: technical diagramming with a code-first approach and AI generation.
The diagram-as-code feature lets you write diagrams in a markdown-like syntax, which appeals to developers who prefer text over drag-and-drop. At $15/month (annual) for Starter, it is reasonably priced but the 3-file limit on Free makes the free tier feel more like a trial than a usable product.
The AI diagram generation is the headline feature — describe what you want in natural language and get an architecture diagram, sequence diagram, or flowchart. The main question is whether you need a dedicated diagramming tool when Mermaid.js (free) or Excalidraw (free) cover basic needs.
Pricing Plans
Free TrialFree
Free
Personal use
- Unlimited diagrams
- 5 team workspaces
- Basic templates
- Export to PNG
Pro
$10/per editor/month
Teams
- Unlimited workspaces
- AI diagram generation
- Version history
- Priority support
Enterprise
Organizations
- SSO/SAML
- Admin controls
- Custom templates
- Dedicated support
Hidden Costs & Gotchas
Free tier 3-file limit is very restrictive — most users outgrow it within a week of active use, making it function more as a trial than a permanent free plan
AI diagram generation counts are per month with no rollover
Starter gets 40, Business gets 250. Each regeneration or iteration counts against your limit, so refining a single diagram can consume 3-5 credits
API calls on Starter and Business are usage-based with additional charges — pricing is not transparent on the main pricing page
Custom icons are capped
20 on Starter, 100 on Business. Teams with extensive design systems or branded diagrams may hit this limit
Version history on Starter is only 90 days — after that, older versions are permanently deleted. Only Business tier offers unlimited history
Per-user pricing means costs scale linearly with team size
a 10-person team on Business pays $450/month ($5,400/year annual) or $600/month monthly
No offline mode
all work requires internet connection. Diagrams are stored in Eraser cloud, not locally
How Eraser.io Compares
5-person engineering team creating architecture and sequence diagrams, 12 months
Which Plan Do You Need?
3 files, 5 AI-generated diagrams, 7-day version history, and unlimited guests. Enough for a solo developer creating architecture diagrams or flowcharts for documentation. Diagram-as-code support is included at every tier.
Unlimited files removes the 3-file cap that makes Free impractical for ongoing use. 40 AI diagrams/month, 90-day version history, and 20 custom icons. The jump from Free to Starter is where Eraser becomes a real tool rather than a trial.
250 AI diagrams/month, unlimited version history, 100 custom icons, SAML SSO, and reference diagrams for linking across documents. The SSO requirement alone forces most companies onto this tier.
Unlimited AI diagrams, flexible deployments, dedicated customer success manager, ACH/wire transfer billing, and usage reporting. Contact sales for pricing.
Our Recommendation
Worth it if...
Your engineering team creates and maintains architecture diagrams, system designs, and technical documentation regularly. The diagram-as-code approach keeps diagrams version-controllable alongside your codebase. The AI generation saves significant time for initial diagram creation. Worth the Starter price if you create more than 3 diagrams per month.
Skip if...
Your diagramming needs are occasional or informal — Excalidraw (free) or Mermaid.js in your markdown docs covers basic flowcharts and sequence diagrams at zero cost. Also skip if your team prefers visual drag-and-drop over code-based diagramming.
Negotiation tips
Annual billing saves 25% over monthly across all tiers. Enterprise pricing is negotiable — request a demo and quote for teams of 20+. If your team is between tiers (e.g., need SSO but not 250 AI diagrams), ask about custom packaging.
