OpenBook vs Lindy
Lindy is a polished, closed-source SaaS for building AI assistants that automate work across your apps, with a friendly builder and many prebuilt integrations. OpenBook delivers a comparable agentic builder — agents, multi-step flows, human approvals — but open source and self-hostable, so your data, prompts, and model keys stay on your infrastructure with no per-credit metering.
At a glance
OpenBook and Lindy, capability by capability.
| Capability | OpenBook | Lindy |
|---|---|---|
| Open source | ||
| Self-hostable | ||
| Visual agent builder | ||
| AI builds the workflow for you | Partial | |
| Agents with long-term memory | ||
| Human-in-the-loop | ||
| Many prebuilt app integrations | Growing plugin set + HTTP | |
| Bring your own model keys | Limited | |
| No per-credit billing |
Why teams pick OpenBook over Lindy
Open source & self-hosted
Run OpenBook on your own box, read every line, and bring your own keys. Lindy is a closed SaaS.
No credit metering
No per-task or per-credit pricing — you pay your model provider directly. Predictable at any volume.
Own your data and prompts
Nothing leaves your infrastructure unless you send it. Important for regulated or privacy-sensitive teams.
AI builder + real workflow engine
Describe a workflow and OpenBook wires the graph, with branching, error paths, and human-in-the-loop pause/resume.
MIT, self-host, your keys.
Closed SaaS with credit-based pricing.
When to choose which
- You need to self-host for privacy, compliance, or cost control
- You want to avoid per-credit metering and vendor lock-in
- You want to read and extend the source
- You want a fully managed SaaS with many polished prebuilt integrations and zero ops
- You prefer a curated, supported commercial product over open extensibility
Recreate each Lindy assistant as an OpenBook agent (prompt + actions), and each automation as a workflow graph. The AI builder can scaffold the graph from a description.
Frequently asked questions
Build your first agentic workflow today.
OpenBook is free and open source. Self-host it in minutes, or read the docs to see how far the engine goes.