ForthWrite
An inline email drafting extension that learns your personal writing voice from sent messages to generate context-aware replies.
Open productWhat it does
About ForthWrite
ForthWrite, founded by Curtis Boortz and operated by Aesir Labs, LLC, is an AI writing assistant that operates as a browser extension across Gmail, Outlook on the web, and LinkedIn messaging. Rather than utilizing generic writing templates, it analyzes sent email history to build tailored voice profiles and leverages retrieval-augmented generation to compose inline draft replies reflecting the user's authentic style.
- Availability:
- launched
- Access:
- freemium
- Format:
- software
- Platform:
- browser extension
Pricing at launch: Free plan includes 10 drafts per week with no credit card or API key required. Standard plan is $15/month billed annually or $18/month billed monthly. Paid plans offer a ~17% discount for bringing your own API key (BYOK) from OpenAI, Anthropic, Google, or xAI.
Core capabilities
Personal Voice Profile Matching
Constructs personal voice profiles from sent emails and automatically refreshes them approximately every 50 captured messages to reflect evolving writing styles.
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