Draw.io vs Principle: Pricing Comparison 2026
Side-by-side pricing comparison of Draw.io and Principle. See all plans, features, and costs at a glance.
Bottom line: Draw.io starts at Custom pricing and Principle starts at Custom pricing. Compare all 3 pricing tiers side by side.
Last updated: March 16, 2026
Draw.io vs Principle: Quick Pricing Facts
| Feature | Draw.io | Principle |
|---|---|---|
| Starting Price | Custom pricing | Custom pricing |
| Number of Plans | 2 | 1 |
| Free Tier | Yes | No |
| Pricing Model | open-source | flat |
| Annual Discount | N/A | N/A |
Draw.io and Principle are both priced at Custom pricing, making them equally accessible Design Tools. Together they offer 3 pricing plans with 4 features compared, so the best choice comes down to which features match your needs.
Draw.io stands out with a free plan for getting started. Draw.io uses open-source pricing while Principle uses flat pricing, which may affect your total cost at scale.
Review the detailed tier-by-tier comparison above to see exactly which features are included at each price point and find the best fit for your Design Tools needs.
| Pricing Plans |  Draw.io Try it free |  Principle Try it free |
|---|---|---|
| Tier 1 | Free $0/monthCheapest Includes
| See For Yourself Custom pricing |
| Tier 2 | ProPopular Custom pricing Includes
| — |
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Draw.io
Draw.io offers a free plan, offers 2 tiers vs 1.
Based on pricing data only. Review the full comparison below for your specific needs.
Best value: Draw.io
Try Draw.io freeWhich Should You Choose?
Choose Draw.io if:
- •You need a free plan with No login or registration required, Diagram generation uses OpenAI—Draw.io offers no-cost access with no credit card required
- •You need 2 pricing tiers for flexible team sizing—more options mean less overpaying for features you don't need
- •You want more features built-in—Draw.io offers 4 additional features across its plans
Choose Principle if:
- •You prioritize Principle's user experience and interface over price (both tools are similarly priced)
- •Principle's single-tier flat structure gives clearer cost visibility for budget planning
- •Principle keeps its feature set lean, which means faster onboarding and less complexity
Draw.io offers a free plan [1], eliminating the cost barrier for evaluation, while Principle requires paid subscription from the start. This gives Draw.io a significant advantage for teams with budget constraints or extended trial periods. Once you outgrow Draw.io's free tier, upgrading to a paid plan at approximately Custom pricing provides substantial additional functionality. Compare this pricing path against Principle's tiering starting at Custom pricing to assess total cost of ownership over 12 months. Draw.io's 2 tiers provide flexibility at different budgets, while Principle's 1 tier structure may force you into higher-cost plans than necessary for your use case. If evaluation cost matters to your decision, Draw.io is the obvious starting point with zero financial commitment. Use the free tier to validate core functionality before committing to paid plans from either tool.
Frequently Asked Questions: Draw.io vs Principle
How many pricing plans does Draw.io have vs Principle?
Does Draw.io or Principle offer a free plan?
What is the most popular Draw.io plan?
Does Draw.io or Principle offer custom enterprise pricing?
What pricing models do Draw.io and Principle use?
How do Draw.io and Principle compare for Design Tools?
Sources
- Draw.io Official Pricing— Vendor pricing page
- Principle Official Pricing— Vendor pricing page
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