Anthropic's AI assistant known for thoughtful long-form writing, coding, and analysis of large documents. Free tier available; paid plans unlock higher limits and the most capable models.
FreemiumFree planAPIGeneral-purpose

Open-source outliner with AI-assisted linking and querying; fully free and local-first.
Anthropic's AI assistant known for thoughtful long-form writing, coding, and analysis of large documents. Free tier available; paid plans unlock higher limits and the most capable models.
Microsoft's AI assistant across Windows, Edge, and Microsoft 365 for writing, summarizing, and image creation. Free to use with a Microsoft account; Pro adds Office integration.
Free AI no-code platform for mobile apps. Native iOS and Android export.