Kastor vs Lindy (2026)
A side-by-side comparison of Kastor and Lindy on pricing, features, and fit, so you can decide which is right for you.
Quick answer
Kastor and Lindy are both strong choices, but they fit different needs. Choose Kastor if you mainly need building multi-step research assistants that delegate subtasks to specialized sub-agents — its edge is completely free and open-source with no licensing fees or usage limits. Choose Lindy if you need automating email management and inbox triage for busy professionals — its edge is extremely accessible for non-technical users thanks to its no-code, conversational setup. Kastor starts at Free; Lindy starts at $49/month for expanded task limits and premium integrations.
Features compared
- Multi-agent orchestration framework for coordinating multiple AI agents simultaneously
- Open-source codebase with full transparency and community-driven development
- Extensible architecture supporting custom LLM backends and tool integrations
- Agent communication and context-sharing protocols for collaborative task execution
- No-code AI agent builder with a visual, conversational setup interface
- Deep integrations with 200+ apps including Gmail, Slack, Notion, and HubSpot
- Multi-step workflow automation with conditional logic and branching
- Pre-built agent templates for common use cases like email triage and lead qualification
Pros & cons
- Completely free and open-source with no licensing fees or usage limits
- Gives developers full control over agent logic, memory, and integrations
- Active open-source community enables rapid iteration and community-contributed extensions
- Requires developer expertise to set up and configure compared to managed platforms
- Documentation and support may be limited compared to commercial multi-agent frameworks
- Extremely accessible for non-technical users thanks to its no-code, conversational setup
- Wide library of integrations covers most popular business tools out of the box
- Pre-built templates help users get productive within minutes of signing up
- Task run limits on lower-tier plans can be restrictive for high-volume workflows
- Complex, highly customized agent logic may still require significant setup time and iteration
The verdict
Choose Kastor if
you mainly need to building multi-step research assistants that delegate subtasks to specialized sub-agents. Its edge: completely free and open-source with no licensing fees or usage limits.
Choose Lindy if
you mainly need to automating email management and inbox triage for busy professionals. Its edge: extremely accessible for non-technical users thanks to its no-code, conversational setup.
Frequently asked questions
Is Kastor better than Lindy?
Neither is universally better. Kastor is stronger for building multi-step research assistants that delegate subtasks to specialized sub-agents, with an edge in completely free and open-source with no licensing fees or usage limits. Lindy is stronger for automating email management and inbox triage for busy professionals, with an edge in extremely accessible for non-technical users thanks to its no-code, conversational setup. Pick based on your main task.
Which is cheaper, Kastor or Lindy?
Kastor starts at Free and Lindy starts at $49/month for expanded task limits and premium integrations. Free tier: Kastor — Fully free and open-source; Lindy — Free plan available with limited task runs per month.
What is Kastor best for?
Kastor is best for building multi-step research assistants that delegate subtasks to specialized sub-agents, automating complex workflows where multiple ai agents must collaborate and hand off results, prototyping agentic pipelines for startups or research teams without incurring api or platform costs.
What is Lindy best for?
Lindy is best for automating email management and inbox triage for busy professionals, building ai-powered sales assistants that qualify and follow up with leads, creating automated customer support workflows that route and respond to tickets.
Do Kastor and Lindy have free plans?
Kastor: Fully free and open-source. Lindy: Free plan available with limited task runs per month. Check each tool's pricing page for current limits, as plans change.