Cal.ai
Devin
| Feature | Cal.ai | Devin |
|---|---|---|
| Pricing | Free / from $12/mo | From $20/mo |
| Free Plan | ✓ Yes | ✗ No |
| Rating | 4.2 / 5 | 4 / 5 |
| Best For | busy-professionals, sales-teams, executives, recruiters | engineering-teams, enterprise-developers, code-maintenance, automated-testing |
| Founded | 2023 | 2024 |
| Natural Language Scheduling | ✓ | ✗ |
| Conflict Resolution | ✓ | ✗ |
| Email Assistant | ✓ | ✗ |
| Multi Calendar Sync | ✓ | ✗ |
| Time Preferences | ✓ | ✗ |
| Meeting Routing | ✓ | ✗ |
| Autonomous Coding | ✗ | ✓ |
| Planning | ✗ | ✓ |
| Debugging | ✗ | ✓ |
| Deployment | ✗ | ✓ |
| Code Review | ✗ | ✓ |
| Testing | ✗ | ✓ |
| Slack Integration | ✗ | ✓ |
✓ Cal.ai Pros
- Natural language scheduling via email or chat
- Automatic conflict resolution across calendars
- Open-source foundation with full transparency
- Works with existing Cal.com scheduling infrastructure
✗ Cal.ai Cons
- AI features still maturing
- Requires Cal.com account as foundation
- Limited language support beyond English
✓ Devin Pros
- Truly autonomous (handles multi-step engineering tasks)
- Own environment with terminal, browser, and code editor
- Can learn from documentation and unfamiliar codebases
- Handles real GitHub issues and PRs independently
✗ Devin Cons
- No free tier
- ACU costs add up on complex tasks
- Output quality varies by task complexity
- Team plan expensive at $500/month
The Verdict
Cal.ai is built for busy professionals and sales teams, with a focus on natural-language-scheduling and conflict-resolution. Devin targets engineering teams and enterprise developers and leads with autonomous-coding and planning.
On pricing, Cal.ai is the clear winner for budget-conscious users — starting at $12/mo compared to $20/mo for Devin. That $8/mo difference adds up quickly for growing teams.
Cal.ai has a free plan, which gives it a meaningful edge for individuals and small teams exploring their options. Devin requires a paid subscription from day one.
Feature-wise, Devin offers broader built-in capabilities (7 features vs 6), while Cal.ai takes a more focused approach — which can mean a simpler, faster onboarding experience.
This is a genuinely close comparison. If you can, sign up for both free trials (where available) and run a one-week test with your actual team tasks before deciding.