Alternatives · Productivity · updated Oct 15, 2026
Shortwave alternatives
Shortwave ranks #4 of 6 for email writing & inbox management with an evidence score of 22/100. Its weak spot: Gmail-only, and the bundled-threads inbox model takes getting used to. 5 other tools are ranked for the same job (email writing & inbox management); 3 score higher, 4 can be used free and 0 are open source. Same public signals as the ranking, recomputed nightly — nothing here is sponsored. Read the Shortwave review.
All 5 alternatives, ranked
evidence / 100
+ Deep Research produces long cited reports from dozens of sources, and it reads your Gmail, Drive and Calendar directly when you allow it.
− Quality swings between Flash and Pro models, and it refuses or hedges on some topics more than competitors.
+ Works in nearly every text field on every platform, so corrections and tone suggestions follow you into Gmail, Slack and Word.
− Suggestions can flatten a distinctive voice and the premium nag prompts in the free tier are constant.
+ Works inside the Office apps you already use, drafting Outlook replies, summarizing Teams meetings and turning Word docs into PowerPoint decks.
− Results inside Excel and PowerPoint are often shallow compared with the standalone chat, which makes the $30 business seat hard to justify.
+ Write with AI learns your sent mail and produces replies that sound like you, and Auto Summarize puts a one-line gist atop every thread.
− Expensive for an email client, and it only works on Gmail and Microsoft 365 accounts.
+ The real-time score and prospect research panel sit next to the compose box and make cold emails shorter and more specific.
− Scores reward a formulaic short style, and it is sales-specific rather than a general email assistant.
Why switch?
Gemini instead of Shortwave if
- you want the stronger public evidence (77 vs 22)
- you need it on api
Grammarly instead of Shortwave if
- you want the stronger public evidence (25 vs 22)
- you need it on chrome-extension, windows
Microsoft Copilot instead of Shortwave if
- you want the stronger public evidence (25 vs 22)
- you need it on windows