Archived open-source alternatives to Plus

Archived comparisonAI3/3 alternativesSetapp v1.2.7Checked

This is an archived research snapshot of open-source alternatives to Plus. It preserves 3 previously reviewed projects for readers following older links. The comparison is no longer part of the current catalog and its metadata may be stale, so confirm each license, release, and macOS requirement before relying on it.

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The research shortlist

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1

TextWardenTop pick

Apache-2.0Eligibility checkedmacOS

System-wide local grammar and AI writing help

Metadata checked Aug 18, 2026

Why this pick

Ranked first because it most closely reproduces Plus's cross-app writing assistance with native Accessibility integration, local processing, and no subscription; its beta status and macOS 26 requirements reduce confidence.

A native macOS writing assistant that checks text across apps as you type and can compose or rewrite selected text with on-device Apple Intelligence.

Key capabilities
  • 01Real-time local grammar, spelling, punctuation, and style checking across Mac apps
  • 02AI style suggestions and compose/rewrite tools using on-device Apple Intelligence
  • 03Sketch Pad for drafting, revision, and quick writing actions
  • 04Universal Intel and Apple Silicon DMG for macOS 26 or later
Caveats
  • Beta and actively evolving; Accessibility behavior and formatting can vary by application.
  • Requires macOS 26 or later; Apple Intelligence style and compose features require Apple Silicon.
  • Grammar checking is currently English-focused and it is not a general translation or research assistant.
Evidence sources (4)
2

AnythingLLM

MITEligibility checkedmacOSWindowsLinuxv1.16.0 · 64.9k ★ · pushed Aug 18, 2026

Local-first AI workspace for documents and productivity

Metadata checked Aug 18, 2026

Why this pick

Ranked second for its polished Mac desktop delivery, strong maintenance and community, local no-account workflow, and productivity features that extend beyond basic chat.

Full review — capabilities, 2 caveats, evidence

A native desktop AI workspace for local model chat, document knowledge, agents, and on-device productivity workflows without an account or cloud API key for core use.

Key capabilities
  • 01Desktop app for local model chat, document knowledge, agents, and workflows
  • 02Local-by-default operation with no account or cloud API key required for core use
  • 03Native macOS builds for Apple Silicon and Intel
  • 04Custom prompts, transcription tools, and optional provider integrations
Caveats
  • The MIT-licensed desktop core is free, but some optional desktop assistant features have daily free limits or require Pro for unlimited use.
  • It is a broader AI workspace rather than a lightweight one-keystroke writing popover.
Screenshots
AnythingLLM screenshotAnythingLLM screenshot
Evidence sources (12)
3

Jan

Apache-2.0Eligibility checkedmacOSWindowsLinuxv0.8.4 · 44.0k ★ · pushed Aug 18, 2026

Free, open-source ChatGPT-style desktop AI

Metadata checked Aug 18, 2026

Why this pick

Ranked third for its polished open-source assistant workflow, active releases, strong Mac download path, and offline capability; it is less system-wide than Plus.

Full review — capabilities, 3 caveats, evidence

A desktop hub for local LLMs, custom assistants, and optional cloud providers, with an offline mode that keeps the workflow on the Mac.

Key capabilities
  • 01Runs local LLMs offline with models from Hugging Face
  • 02Custom assistants and reusable prompts
  • 03Optional OpenAI, Anthropic, Mistral, Groq, and other provider integrations
  • 04OpenAI-compatible local API and MCP support
  • 05Official macOS DMG with macOS 13.6 or later support
Caveats
  • Cloud providers may charge separately; the no-payment path is local models.
  • There is no documented global selected-text rewrite popover comparable to Plus.
  • Model size and quality determine RAM, storage, and response speed requirements.
Screenshots
Jan screenshot
Evidence sources (14)

Specifications, side by side

Side-by-side comparison of open-source alternatives to Plus
Attribute1 · TextWarden2 · AnythingLLM3 · Jan
LicenseApache-2.0MITApache-2.0
PlatformsmacOSmacOS, Windows, LinuxmacOS, Windows, Linux
StatusCheckedCheckedChecked
Version—v1.16.0v0.8.4
Stars—64.9k44.0k
Last push—
Caveats323

About Plus

A Mac AI writing assistant that opens from a shortcut in any text window to rewrite, proofread, summarize, explain, translate, and run custom prompts.

Setapp listing: Work with text using AI

Setapp metadata sources (1)