Tangle
Tangle: A focused environment for evaluating agent workflows, traces, simulations, and regressions. Ranked #21 of 28 in AI Agent Evaluation Tools by our editors (7.1/10); pricing: Free plan; best for teams testing workflows in isolated environments.
At a glance
- Editor score7.1 / 10
- PricingFree plan
- Best forTeams testing workflows in isolated environments
- Free planYes
- Paid from$29/mo
- Tool-call checksYes
- Facts checked21 Sep 2026
Where it wins
- Isolated sandboxes include shell, files, ports, and browser access
- Records model calls, tool use, timing, tokens, costs, and errors
- Supports simulations, comparisons, regression checks, and searchable history
Where it doesn't
- Safety evaluation details are not supplied
- Evaluation-method details are not supplied
- The Free plan includes one concurrent sandbox
Our verdict on Tangle
Tangle is a platform for running and evaluating AI agents through web and API access. Its Sandbox and Intelligence components support isolated environments with files, terminals, browsers, and coding harnesses, while recording model calls, tool use, timing, tokens, costs, and errors. It is aimed at teams that need to inspect agent behavior, repeat task executions, and review workflow changes before deployment.
The platform’s evaluation workflow covers simulation batches, side-by-side comparisons of prompts, models, and tools, regression checks, searchable run and span history, and OpenTelemetry trace ingestion. Findings can be used to create evaluations, alerts, webhooks, and testing datasets. This makes Tangle a fit for teams that want one place to run agents, examine traces, compare candidate changes, and track repeated executions. It also supports routed model calls and evaluation runs through its Intelligence component.
Tangle uses a usage-oriented freemium model with monthly credit included in each plan. The Free plan costs $0 per month and includes one concurrent sandbox, 60 requests per minute, and community support. Pro costs $29 per month and adds 25 concurrent sandboxes, 300 requests per minute, overage at the same per-second rates, and priority scheduling. Enterprise costs $99 per month and includes unlimited concurrent sandboxes, discounted compute rates, 1000 requests per minute, dedicated support, and an SLA guarantee. Choose Tangle if isolated execution, trace inspection, repeatable simulations, and regression review are central requirements. Teams prioritizing detailed safety evaluation or documented evaluation methods should consider alternatives with clearer coverage in those areas.
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Tangle pricing
All 3 Tangle plans and prices →
Tangle fact sheet
| Free plan | Yes |
|---|---|
| Paid from | $29/mo |
| Evaluation methods | Not verified |
| Tool-call checks | Yes |
| Trace ingestion | Yes |
| Safety evaluations | Not verified |
| Regression runs | Yes |
| SDK language support | Not verified |
| Dataset limit | Not verified |
| Deployment | Cloud, Self-hosted |
| Platforms | Web |
| Support | Community, Docs |
| Built for | Small business, Enterprise (editorial estimate) |
| Pricing | Free plan (source) |
| Website | tangle.tools |
| Facts checked | 21 Sep 2026 |
Alternatives to Tangle
- DeepEvalA developer-focused evaluator for testing agents, tools, safety, and regressions.9.4
- AgentClashAgentClash tests agent behavior with replayable evidence, sandboxing, safety checks, and CI gates.9.3
- Future AGI AI Evaluation SDKBroad evaluation coverage with SDKs, tracing, simulations, and CI/CD quality gates.9.2
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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