kitio.aiOneCompiler vs Helicon
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Helicon is completely free, while OneCompiler is freemium.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- 110+ languages and databases
- In-editor coding agent
- Checkpoints and rollback
- Embeddable editor
- Code execution API
- GUI for Muse Code sessions
- Inline diffs
- Approval prompts
- Project and worktree grouping
- Cost tracking
- Windows, macOS, Linux and VS Code
| Feature | OneCompiler | Helicon |
|---|---|---|
| Best for | Online compiler for 110+ languages with a built-in coding agent | Open-source desktop and web app for Meta's Muse Code agent |
| Category | Coding | Coding |
| Pricing model | Freemium | Free |
| Starting price | See pricing page | Free |
| Free plan | Yes | Yes, fully free |
| Made by | OneCompiler | Harjot Singh |
| Based in | – | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Helicon is completely free, while OneCompiler is freemium.
Free plan
Cheapest paid plan
Top plan
Free trial
Prices in USD, checked Nov 5, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
OneCompiler
- Runs code without any setup
- Agent available on the free plan
- Embeddable for teaching and hiring
- Paid plan prices not shown in the evidence
- Better models need daily credits
- Browser-only workspace
Helicon
- Completely free with no paid tier
- Native Windows support without WSL
- Keeps your login and data local
- Requires a Muse Code subscription
- Unofficial, so updates may lag Muse Code
- Only works with one coding agent
Which one should you choose?
Choose OneCompiler if you want:
- Runs code without any setup
- Agent available on the free plan
- Embeddable for teaching and hiring
Watch out: paid plan prices not shown in the evidence.
Choose Helicon if you want:
- Completely free with no paid tier
- Native Windows support without WSL
- Keeps your login and data local
Watch out: requires a muse code subscription.
OneCompiler vs Helicon FAQ
What is the difference between OneCompiler and Helicon?
OneCompiler: Online compiler for 110+ languages with a built-in coding agent. Helicon: Open-source desktop and web app for Meta's Muse Code agent. Both are coding tools.
Is OneCompiler or Helicon cheaper?
Helicon is completely free, while OneCompiler is freemium.
Do OneCompiler and Helicon have free plans?
OneCompiler: Yes. Helicon: Yes, fully free.
Who makes OneCompiler?
OneCompiler is made by OneCompiler.
Who makes Helicon?
Helicon is made by Harjot Singh.
Which should I choose, OneCompiler or Helicon?
Choose OneCompiler if you value runs code without any setup and agent available on the free plan. Choose Helicon if you value completely free with no paid tier and native windows support without wsl.