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Machine Learning · head to head

Langwatch vs Manus

Langwatch logo

Langwatch

Machine Learning

LLM engineering platform for testing and evaluating AI agents in production

From
Free
Free plan
Yes
Full reviewWebsite
Manus logo

Manus

AI

General-purpose AI agent executing multi-step tasks in a hosted environment

From
On request
Free plan
No
Full reviewWebsite

The short version

  • Only Langwatch has a free tier, so it costs nothing to try first.
  • Each has a real cost: Langwatch free plan limited to 50k events per month, restricting larger deployments; Manus specific pricing and plan tiers not published on accessible pages; users must visit pricing page or contact sales
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Langwatch and Manus actually diverge.

Attributes where Langwatch and Manus differ
AttributeLangwatchManus
Starting priceFreeOn request
Pricing modelTiered subscription with usage-based overage chargessubscription
Free tierYesNo
PlatformsWeb, Docker, KubernetesWeb, iOS, Android, Desktop, Slack integration
CategoryMachine LearningAI

Identical on both: user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Langwatch

  • Agent simulation testing
  • LLM evaluation
  • OpenTelemetry tracing
  • Langy AI Engineer
  • Governance controls
  • Multiple deployment options
  • Framework support

Only in Manus

Nothing recorded that Langwatch does not also cover.

What people use each for

The jobs each tool is most often brought in to do.

Langwatch

  • Continuous testing of AI agents before production deploymentnot Manus
  • Automated test creation from product requirementsnot Manus
  • LLM response quality evaluation and scoringnot Manus
  • Production agent monitoring and cost trackingnot Manus
  • Governance and access control for AI systemsnot Manus

Manus

  • Autonomous research and report generationnot Langwatch
  • Slide deck and presentation creation from requirementsnot Langwatch
  • Website and graphic design automationnot Langwatch
  • Game development and interactive content creationnot Langwatch
  • Multi-step workflow automation via browser operatornot Langwatch

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Langwatch

  • Free plan limited to 50k events per month, restricting larger deployments
  • Pricing in EUR may complicate budgeting for US-based teams
  • Usage-based overage model can create unpredictable costs
  • Self-hosted option requires DevOps expertise

Manus

  • Specific pricing and plan tiers not published on accessible pages; users must visit pricing page or contact sales
  • Organisational transition mid-2026; unclear how this affects feature stability or pricing continuity
  • No clear free tier mentioned; access requires subscription from apparent launch
  • Limited public documentation on capabilities and limitations

Pricing, plan by plan

Langwatch

Free
  • DeveloperFree
    • 50k events per month
    • 14-day data access
    • 2 users
  • Growth$29/month
    • 200k events per month included
    • 5 EUR per 100k additional events
    • 30-day data retention
  • Enterprise$undefined/custom
    • Custom event limits
    • Hybrid, self-hosted or on-premises deployment
    • Custom SSO and RBAC

Manus

On request

No published plan breakdown. See the Manus review.

Which should you pick?

Choose Langwatch if

  • You need agent simulation testing.
  • You want to start without paying.
  • You work on Web, Docker, Kubernetes.
  • You also want llm evaluation.
Langwatch review

Choose Manus if

  • You work on Web, iOS, Android, Desktop, Slack integration.
Manus review

Questions people ask

Is Langwatch or Manus better?
Neither clearly leads. Langwatch starts at Free and Manus at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Langwatch or Manus?
Langwatch has a free tier; the other does not. Paid plans start at Free for Langwatch and On request for Manus.
Does Langwatch or Manus run on more platforms?
Langwatch runs on Web, Docker, Kubernetes. Manus runs on Web, iOS, Android, Desktop, Slack integration.
Can I use Langwatch for free?
Yes. Langwatch has a free tier, so you can try it without paying. Manus starts at On request.
What is Langwatch best used for?
Langwatch is most often used for continuous testing of ai agents before production deployment, automated test creation from product requirements, llm response quality evaluation and scoring, production agent monitoring and cost tracking. Of those, continuous testing of ai agents before production deployment and automated test creation from product requirements are not what Manus is typically brought in for.
What can Langwatch do that Manus cannot?
Langwatch covers Agent simulation testing, LLM evaluation, OpenTelemetry tracing, Langy AI Engineer.

Answered from the vendors’ own pages

Langwatch: Is there a permanent free tier?

Yes, Langwatch's Developer plan is free forever with 50k events per month, 14-day data access, 2 users, and no credit card required. It is specifically designed for individual developers prototyping AI applications.

Source
Manus: Where can I find Manus pricing information?

The Manus pricing page at manus.im/pricing mentions 'Manus Pricing Plans' with the tagline 'Less structure, more intelligence,' but specific pricing details and tier information are not published online. Contact Manus directly to discuss pricing options.

Source
Langwatch: What is Langy and how does it save time?

Langy is an AI-powered tool that automates test creation. It converts product requirements into test scenarios, runs simulations, scores results, and generates pull requests with fixes in a median of 14 minutes.

Source
Manus: Does Manus offer a team plan option?

Manus mentions a team plan option on its pricing page, but specific details about team size limits, per-seat costs, and features are not published. Interested customers should contact Manus sales to discuss team pricing.

Source
Langwatch: What frameworks does Langwatch support?

Langwatch works with LangGraph, LangChain, CrewAI, OpenAI Agents, AWS Bedrock, Azure OpenAI, Vertex AI, and other major LLM frameworks and platforms.

Source
Manus: What features are available in Manus?

Manus offers AI design, slides, image generation, music generation, browser operator, and other creative automation features. Specific feature availability by pricing tier requires contacting Manus directly for custom pricing information.

Source
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