kitio.aiCalmo vs Herald
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Calmo starts at See pricing page and Herald starts at See pricing page. 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
- Autonomous alert investigation
- Parallel hypothesis testing
- Playbook and SOP library
- Postmortem generation
- Remediation plans with PRs
- Observability integrations
- Predictive issue detection
- Root cause analysis
- Suggested resolutions
- CLI agent
- Slack and Teams collaboration
- Bring your own model
| Feature | Calmo | Herald |
|---|---|---|
| Best for | AI agents for SRE work like incident triage and root cause analysis | AI SRE that finds production issues and their root cause early |
| Category | Coding | Coding |
| Pricing model | Free trial | Freemium |
| Starting price | See pricing page | See pricing page |
| Free plan | No, trial available | Yes |
| Made by | Calmo | Herald |
| Based in | – | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Calmo starts at See pricing page and Herald starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
4 plans
Hobby
Free
- Herald CLI agent
- Local integrations
- Limited agent requests
Individual
$20/mo billed yearly
- Root cause analysis
- Predictive detection
- Suggested resolutions
Teams
$40/user/mo billed yearly
- Per user
- Cloud agent and integrations
- Slack and Teams collaboration
Enterprise
Contact sales
- Custom deployment
Prices in USD, checked Oct 29, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Calmo
- Works with common observability tools
- Uses your own runbooks
- Turns incidents into reusable knowledge
- No public pricing
- Needs broad access to production systems
- Most value for teams with mature monitoring
Herald
- Free CLI tier without a card
- Catches issues before alerts fire
- Bring your own model or cloud
- Cloud agent needs the Teams plan
- Per-user pricing for teams
- Recently rebranded from RunLLM
Which one should you choose?
Choose Calmo if you want:
- Works with common observability tools
- Uses your own runbooks
- Turns incidents into reusable knowledge
Watch out: no public pricing.
Choose Herald if you want:
- Free CLI tier without a card
- Catches issues before alerts fire
- Bring your own model or cloud
Watch out: cloud agent needs the teams plan.
Calmo vs Herald FAQ
What is the difference between Calmo and Herald?
Calmo: AI agents for SRE work like incident triage and root cause analysis. Herald: AI SRE that finds production issues and their root cause early. Both are coding tools.
Is Calmo or Herald cheaper?
Calmo starts at See pricing page and Herald starts at See pricing page. Check both pricing pages for current plans.
Do Calmo and Herald have free plans?
Calmo: No, trial available. Herald: Yes.
Who makes Calmo?
Calmo is made by Calmo.
Who makes Herald?
Herald is made by Herald.
Which should I choose, Calmo or Herald?
Choose Calmo if you value works with common observability tools and uses your own runbooks. Choose Herald if you value free cli tier without a card and catches issues before alerts fire.