Overmind vs Tessary
Overmind and Tessary are both uptime & monitoring tools aimed at developers and small businesses. Both have a free plan.
Open-source loop that turns AI agent traces into models you own
Open-source monitoring that finds why production AI agents fail
| Pricing | Open source · $120 | Open source |
| Starting price | $120/mo | Not published |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Built for | Developers, Small businesses, Enterprise | Developers, Small businesses, Enterprise |
| Platforms | web, linux | web, linux |
| Country | GB | — |
| Rating | — | — |
Choose Overmind if
Engineering teams with agents in production that want to improve accuracy and cost and keep ownership of the models.
- Open source and self-hostable, with weights you keep
- Covers the full loop from tracing to serving in one product
- Fixes arrive as reviewable git diffs instead of opaque changes
Look elsewhere if: Teams that only need LLM tracing inside a broader monitoring stack (Datadog) or have no production traffic yet.
Choose Tessary if
Engineering teams running AI agents in production with OpenTelemetry traces who want every trace checked and failures explained.
- Apache 2.0 open source with free self-hosting
- Checks every trace instead of a sampled subset
- RCA links failures to specific commits when a repo is connected
Look elsewhere if: Teams that want a mature, fully supported observability suite or an eval-first workflow (Datadog, Braintrust).
Overmind vs Tessary pricing
Overmind
- Free$0/mo10 optimize runs, 2 training jobs/mo, 5 projects, $50 one-time credit
- Pro$120/moUnlimited optimize runs, training, deploys and projects
- EnterpriseCustomSSO, dedicated support, custom onboarding, usage contracts
- Self-hosted$0AGPL-3.0 platform via Docker Compose; SDK and CLI under MIT
Tessary
- Open Source$0Self-host with Docker Compose; all core features
- Cloud Free$010k traces/mo, 1 GB, 30-day retention, $10 one-time RCA credit
- PaidCustomCustom classifiers, managed dedicated instance, Slack support
Overmind · Key features
- OpenTelemetry tracing with scores applied to traces as they arrive
- Root-cause views that isolate the failing step, tool call or context
- Data Workshop with versioned datasets built from production traffic
- User-defined evals running on live traces
- Optimizers that return prompt, tool or code fixes as git diffs
- Fine-tuning of small open models with downloadable weights
Cons
- Large jump from Free to the $120 Pro plan
- No annual pricing on the hosted service
- AGPL-3.0 limits closed redistribution of the platform
Tessary · Key features
- Classifiers run on every production trace with no sampling
- Built-in checks for drift, tool errors, secret leaks and malformed output
- LLM triage groups real deviations into trackable cases
- Root-cause analysis over failing traces and your GitHub repository
- OTLP ingestion over HTTP and gRPC with OpenTelemetry gen_ai conventions
- PII redaction before traces are stored
Cons
- Very new project with a short track record
- Paid plan prices are not published
- Frustration classifier requires your own OpenRouter or TypeSafe key
Overmind vs Tessary: FAQ
Do Overmind and Tessary have a free plan?
Yes, both Overmind and Tessary have a free plan; paid plans add more usage and features.