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Harper

Offline, open-source English grammar and style checker with editor integrations. It focuses on proofreading, not Grammarly's full generative-writing suite.

Vale

Open-source prose linter for spelling, style, and terminology with configurable rules. It is a writing-quality checker, not a generative assistant.

OpenAdKit Open Source AI Marketing Tool

Browser-based open-source marketing copy and ad-generation toolkit with bring-your-own model keys. It covers campaign templates and ad copy, not Jasper's full team and brand-governance platform.

Bolt.diy

Open-source prompt-to-app builder based on Bolt's workflow. Run locally and connect a supported model provider; hosting and provider usage are not included.

Singulary

Self-hosted AI app builder for prompting, editing, running, and debugging full-stack projects in isolated workspaces. Bring a compatible model provider and manage deployment yourself.

Open Laudable

Local-first open-source AI app builder that generates React applications from prompts. Connect your own model or API; unlike hosted builders, setup and deployment are yours.

Openpage

Open-source visual website builder with drag-and-drop editing and AI site generation. Better for visual site creation than full cloud IDE or backend-heavy app workflows.

Meet2Notes

Local-first meeting recorder with transcription, speaker diarization, and structured AI notes. Active alpha: requires local compute or a configured model; obtain consent before recording.