Lightfern for Email
The telepathic AI writing tool
192 followers
The telepathic AI writing tool
192 followers
Finish thoughts before fingers hit keys. Working directly in your inbox as a browser extension, Lightfern nails the details that make emails feel like you - nicknames, sign-offs, your tone of voice - and pulls context from past threads to finish sentences the way you would. All with zero data retention by default.
TLDR I used Lightfern since alpha, and it's reduced my inbox anxiety by 80%
LightFern makes writing in Gmail feel effortless and “safer,” especially when you write in multiple languages (English and French for me). The autocomplete is genuinely context-aware: it remembers subtle personal details (who someone is, what you called something last time, your weird turns of phrase) and can even fill in relationship context (e.g., “John… CEO of CompanyZ” popping in automatically). The multilingual handling is a standout—smooth switches between English, French, and frenglish, with far fewer awkward failures than most tools (French slightly less strong than English, but still very usable). You don’t even need to hit Tab constantly; the comfort of having a good suggestion sitting there is weirdly satisfying, and for non-native English (and if you’re a bit shy) full autocomplete reduces anxiety by helping you land the right phrasing faster. The strongest proof is behavioral: you actually use it daily, and you feel noticeably weaker when you’re accidentally logged out (“oops, let’s log in”).
It is so good that I'm starting to use Gmail as a lightweight notetaker because it supports continuous writing, not just post-hoc summaries.
Lightfern for Email
@marie_brayer_ftw
"It is so good that I'm starting to use Gmail as a lightweight notetaker" hahaha I do this too! We're working on getting this working in other places, can't wait to release new features for you to try.
Thank you for being such an early tester! We couldn't have done this without you :)
Lightfern for Email
Hey 👋 I'm Jacek, a Founding Engineer at Lightfern.
I've spent most of my career in startups, which is why I'm especially excited to be here - building and shipping things end to end with a small, focused team. I'm responsible for product delivery across the stack, so if you've got any questions (technical or not), I'm very happy to answer.
What I love about Lightfern is that it's always there when you're stuck - whether that's wording, simplifying an over-complicated sentence, or just getting unstuck.
So, please try it out and share your thoughts 🤗
Namekin
Tried it out as an early release - the UX and general polish is great, and the team behind Lightfern are a really talented and focused group of people. I look forward to continuing to see Lightfern grow and flourish 🌱
Lightfern for Email
@jesperht Thanks Jesper. Always appreciate the support
Zivy
Congrats on the launch @gastlich @mleelightfern @dougli 👏
I loved the idea of “Cursor for email,” especially the focus on personal tone and context. W
Lightfern for Email
Thanks for the feedback!
Lightfern for Email
@mleelightfern @dougli @harkirat_singh3777 Thanks for the kind words 🙇♂️
I've been using Lightfern since its Beta and I just love the context it has on my calendar and previous e-mails.. and all these details pop up just at the right time!
Lightfern for Email
@linh_s Thanks for helping us test out Lightfern! Really appreciate all the feedback
Congrats on the launch! 🚀 Love this telepathic, in‑inbox email copilot with zero data retention.
Lightfern for Email
@zeiki_yu Thank you Zeiki! Glad that this resonates with you!
Congrats on the launch. Authenticity in AI communication is a hard problem, and it’s refreshing to see it addressed head-on instead of optimizing for generic better writing.
Lightfern for Email
@kevan_williams Thanks Kevan! Really appreciate the feedback.
Lightfern for Email
@kevan_williams Thank you - really appreciate that. Authenticity is exactly the hard part we cared most about. We’re trying to build something that supports how people already communicate, rather than replacing it with a “better” but generic version. Feedback like this genuinely means a lot to us 🙏