kitio.aiSentry vs Fast Mode
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Sentry starts at See pricing page and Fast Mode starts at $20/mo. Check both pricing pages for current plans.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Error monitoring
- Tracing and profiling
- Session replay
- Seer AI debugging agent
- AI code review
- Sentry MCP server
- Automatic CMS from HTML
- Visual copy editor
- Page-level SEO controls
- Custom domain and CDN
- Forms API
| Feature | Sentry | Fast Mode |
|---|---|---|
| Best for | Error and performance monitoring with an AI debugging agent | Turns static sites made with AI coding tools into an editable CMS |
| Category | Coding | Coding |
| Pricing model | Freemium | Freemium |
| Starting price | See pricing page | $20/mo |
| Free plan | Yes | Yes |
| Made by | Functional Software (Sentry) | Fast Mode |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Sentry starts at See pricing page and Fast Mode starts at $20/mo. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
4 plans
Developer
Free
- Limited to one user
- Error monitoring and tracing
- 10 custom dashboards
- MCP access
Team
$26/mo billed yearly
- Unlimited users
- Third-party integrations
- 20 custom dashboards
- Seer available as add-on
Business
$80/mo billed yearly
- Unlimited custom dashboards
- Advanced quota management
- SAML and SCIM support
Enterprise
Contact sales
- Technical account manager
- Dedicated support
2 plans
Free
Free
- fastmode.site subdomain
- Blog and team collections
- Visual editor and SEO controls
Pro
$20/mo
- Custom domain
- No Fastmode branding
- CDN delivery
- Forms API
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
Sentry
- Free plan for solo developers
- AI debugging works from real error data
- Wide SDK coverage
- Integrates with GitHub and Slack
- Seer needs a separate subscription
- Free plan is limited to one user
- Costs rise with event volume
Fast Mode
- Works with output from any AI builder
- Free hosting tier
- No setup to create collections
- Custom domains need Pro
- Free plan shows Fastmode branding
- Only two plans to choose from
Which one should you choose?
Choose Sentry if you want:
- Free plan for solo developers
- AI debugging works from real error data
- Wide SDK coverage
Watch out: seer needs a separate subscription.
Choose Fast Mode if you want:
- Works with output from any AI builder
- Free hosting tier
- No setup to create collections
Watch out: custom domains need pro.
Sentry vs Fast Mode FAQ
What is the difference between Sentry and Fast Mode?
Sentry: Error and performance monitoring with an AI debugging agent. Fast Mode: Turns static sites made with AI coding tools into an editable CMS. Both are coding tools.
Is Sentry or Fast Mode cheaper?
Sentry starts at See pricing page and Fast Mode starts at $20/mo. Check both pricing pages for current plans.
Do Sentry and Fast Mode have free plans?
Sentry: Yes. Fast Mode: Yes.
Who makes Sentry?
Sentry is made by Functional Software (Sentry), based in United States.
Who makes Fast Mode?
Fast Mode is made by Fast Mode.
Which should I choose, Sentry or Fast Mode?
Choose Sentry if you value free plan for solo developers and ai debugging works from real error data. Choose Fast Mode if you value works with output from any ai builder and free hosting tier.