Tessary vs Trigger.dev
Tessary and Trigger.dev are both developer tools tools aimed at developers and small businesses. Both have a free plan.
Open-source monitoring that finds why production AI agents fail
Open-source platform for durable background jobs and AI agents
| Pricing | Open source | Open source · $10 |
| Starting price | Not published | $10/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Built for | Developers, Small businesses, Enterprise | Developers, Small businesses, Enterprise |
| Platforms | web, linux | web |
| Country | — | GB · 2022 |
| Rating | — | — |
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).
Choose Trigger.dev if
TypeScript teams that need reliable long-running jobs and AI agents with retries, queues and observability built in.
- Apache-2.0 open source with a self-hosting option
- Waiting time on waitpoints is not billed
- Generous observability for each run
Look elsewhere if: Non-developers or teams working mainly in Python or other languages (Windmill, Pipedream).
Tessary vs Trigger.dev pricing
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
Trigger.dev
- Free$0$5 usage included, 20 concurrent runs, 1-day log retention
- Hobby$10/mo$10 usage included, 50 concurrent runs, 7-day logs
- Pro$50/mo$50 usage included, 200+ concurrent runs, 25+ seats
- EnterpriseCustomRBAC, SSO, SOC 2 report, priority support
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
Trigger.dev · Key features
- Durable TypeScript tasks with no timeouts, retries and checkpointing
- Queues and concurrency controls with per-key overrides
- Cron schedules and waitpoints for human approval up to 90 days
- Realtime run updates and LLM streaming to the frontend
- Verified, deduplicated webhooks that trigger up to 25 agents
- Slack and Linear integrations for chat-driven agents
Cons
- TypeScript and JavaScript SDK only
- Webhooks are still in public beta
- Usage-based compute makes bills harder to predict
Tessary vs Trigger.dev: FAQ
Do Tessary and Trigger.dev have a free plan?
Yes, both Tessary and Trigger.dev have a free plan; paid plans add more usage and features.