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CrewAI vs Nebula

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors.

The short answer

Free plan
Both have one
Public API
CrewAI has one; not confirmed by us for Nebula
Higher Trust score
CrewAI — 92 vs 72 for Nebula
Best fit
CrewAI: Python developers prototyping multi-agent workflows with clear roles and delegation · Nebula: Startups and small teams wanting to delegate whole workflows to an autonomous agent
Platforms
CrewAI: Web, Linux, macOS, Windows · Nebula: Web, macOS, Windows, Linux, iOS, Android

From our own records as of each tool's last check. Anything we have not confirmed is left out rather than guessed. How we verify

CrewAIOpen-source Python framework for role-based agent crews and event-driven flows, with a hosted platform for running themNebulaA platform for building autonomous agents that plan and execute full workflows, not just chat and suggest.

Side by side

FactCrewAINebula
CategoryAI Agents & Autonomous WorkersAI Agents & Autonomous Workers
Pricing modelFreemiumFreemium
Starts at—$15/seat/mo
Public APIYesNot confirmed
Trust score92 / 10072 / 100
PlatformsWeb, API, Linux, macOS, WindowsWeb, macOS, Windows, Linux, iOS, Android
CompanyCrewAI, Inc.Agent Labs, Inc.
Last verifiedSep 6, 2026Sep 1, 2026

What our research says

CrewAI

CrewAI is the quickest way to get a team of role-defined agents working on a task, and Flows added the deterministic control that early crews lacked. The open-source core is free and widely used; the paid platform is for teams that want governance and managed execution without building the plumbing. Treat the enterprise claims on the homepage as marketing and the free tier's 50 executions as a trial, not a plan.

Pros

  • MIT-licensed framework with a large community and about 59,700 GitHub stars
  • Crews for collaboration and Flows for state, branching and loops cover both exploratory and production shapes
  • Free platform tier with a visual editor, AI copilot and GitHub integration costs nothing to try
  • Enterprise deployment on CrewAI cloud, your VPC or on-premise, with PII redaction and policy controls

Cons

  • Enterprise pricing is quote-only, with executions beyond the free 50 a month behind sales
  • Role-playing agent abstractions can hide cost: every delegation is another LLM call
  • Debugging a crew means reading long non-deterministic delegation traces, and observability on the free tier is not described on the pricing page
  • Homepage usage claims (65% of the Fortune 500, 450M+ workflows a month) are the vendor's own

Nebula

Nebula's three-primitive model — Agents, Jobs, Miniapps — is built for handing off entire workflows rather than getting single responses, with the ambition of staffing a role rather than just assisting with a task. The pricing is genuinely hard to predict up front since it's split across per-seat, per-compute-hour, and per-active-minute charges rather than one flat number, which makes budgeting for heavy use difficult until you're actually running agents.

Pros

  • Free workspace to start without a credit card
  • Covers desktop (macOS, Windows, Linux), mobile (iOS, Android), and CLI access
  • Three distinct primitives (Agents, Jobs, Miniapps) give more structure than a single chat-agent product
  • First two team seats are free before the $15/month per-seat charge kicks in

Cons

  • Pricing is split across several usage meters (compute hours, seats, active minutes) rather than one clear number
  • No flat subscription price is published, making cost forecasting harder
  • Autonomous agents acting end-to-end on workflows carry more risk of unsupervised mistakes than assistive tools

Which one fits

Choose CrewAI if you need

  • Python developers prototyping multi-agent workflows with clear roles and delegation
  • Teams that want an opinionated structure (Crews inside Flows) instead of wiring a graph from scratch
  • Enterprises that need SSO, RBAC and VPC deployment around agents they already built on the framework

Choose Nebula if you need

  • Startups and small teams wanting to delegate whole workflows to an autonomous agent
  • Agencies building custom miniapp dashboards on top of agent output
  • Teams comfortable with usage-based pricing rather than a flat monthly fee

CrewAI vs Nebula: the questions people ask

Is CrewAI cheaper than Nebula?

Nebula starts at $15/seat/mo. CrewAI has a free tier; what its paid plans cost is not confirmed by us yet.

Does CrewAI or Nebula have a free tier?

Both: CrewAI has a free tier, and Nebula has a free tier.

Which has a public API, CrewAI or Nebula?

CrewAI ships a public API, as of our last verification. A public API for Nebula is not confirmed by us — check its developer docs before you plan an integration.

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