Lightfern

The telepathic AI writing tool. Finish thoughts before fingers hit keys.

[Lightfern @lightfern_ai]

@sarvagya_kul Should have used Lightfern 👀

[Encode Club @encodeclub]

AI Demo Night 2.0 was 🔥

We co-hosted with @DustHQ last week at Encode Hub and the demos did not disappoint. Shoutout to the teams from @lightfern_ai , @coloopai and @ValyuOfficial - some seriously cool tools being built right now.

If you're building a startup, go check them out. Your workflows will thank you 👀

[Lightfern @lightfern_ai]

@horwitzben Hi Ben! We agree that writing should be sincere and sound like you. We’d love for you to give Lightfern a try for authentic writing enabled by the world’s most powerful autocomplete model ✨

[Encode Club @encodeclub]

AI Demo Night is back at Encode Hub 🔥

See 4 teams demo and get a chance to ask all your burning questions!

🤖 @DustHQ - spin up AI agents that actually know your business
🖊️ @lightfern_ai - autocomplete that writes in your voice
🔍 @coloopai - qual research analysis in minutes, not weeks
📡 @ValyuOfficial - deep research API for knowledge work

May 6th | 6:30pm | Shoreditch

Spots limited 👇

[Lightfern @lightfern_ai]

@RohanSaphal @dougli_ @meetgranola Thanks for coming, Rohan! Would love for you to give Lightfern a whirl and let us know what you think 🪴✨

[Rohan Saphal @RohanSaphal]

Really great to hear @dougli_ and his experience building @lightfern_ai yesterday at @meetgranola !

[shre @theshre]

April at Granola:
– Fireside with OpenAI's first hire in London (tomorrow!)
– Demo night: see agents people have built for their personal lives
– Breakfast for people who've quit/quitting to build
– Our second YC London alum hang
– & weekly ⚽ for Shoreditch tech

[shre @theshre]

One of my favourite people to talk to about making UK tech stronger is @dougli_ and I'm excited to have him speak at @meetgranola on April 7!

Doug is the co-founder of @lightfern_ai, the telepathic AI writing tool that pulls context from your email threads to predict whole phrases as you type. All powered by an autocomplete model they trained in-house.

He was previously the first hire for OpenAI UK and his research team significantly improved GPT-4o's writing, voice accents, & image gen.

April 7. RSVP below!

[Lightfern @lightfern_ai]

@anth0nybeaumont @encodeclub Hey Anthony, thanks for getting in touch - we’d love to! How can we make this happen?

[Lightfern @lightfern_ai]

We’ve launched today on Product Hunt!

🪴Meet Lightfern: the telepathic AI writing tool. Finish thoughts before fingers hit keys.

🌍 This is the best autocomplete model in the world, proudly built in Europe.

🔍 Check us out here: https://t.co/wZuZfwGbxl

[Adewale Oshineye @ade_oshineye]

@badlogicgames @zeyu1337 Finally @dougli_ from @lightfern_ai talking about product design principles for agentic UIs.

[Lightfern @lightfern_ai]

@vxanand We can guess both you and Tess go through a lot of emails…we can help with that 😉 https://t.co/Pt1SSW6U7R - check us out!!

[Lightfern @lightfern_ai]

@N80rious 🫡 we can’t wait to get those working!

[Lightfern @lightfern_ai]

@N80rious That’s the long term plan! Where should we go next?

[Lightfern @lightfern_ai]

@SebJohnsonUK @CatGodSandHive @dougli_ Thanks for covering, Seb - so glad to hear you’re enjoying it!

[Lightfern @lightfern_ai]

@CatGodSandHive @SebJohnsonUK @dougli_ Integration anywhere you write is the long term plan. We’re changing the game for AI-powered writing, starting with your inbox 📥 🚀

[Seb Johnson @SebJohnsonUK]

OpenAI's first employee in London has just come out stealth.

Douglas Li (@dougli_) was a researcher and engineering manager before leaving to build his own startup in stealth.

He's now brought @lightfern_ai out of stealth

It's an email autocomplete extension which gives users an entire phrase / sentence, and is fully contextual based on previous emails and writing.

I'd seen @Carles_Reina post about it so wanted to try it myself.

I started using it yesterday evening, and although I've only used it for a few emails it seems strong. I'll report back after a week or so.

It sounds like the plan is to roll it out across other types (e.g. google docs) and I'd love to try it out on LinkedIn 😂.

Worth checking out - I'll link it below.

Shoutout to the team at @VisionariesClub for sending it my way!

[Douglas Li @dougli_]

🪴 Meet Lightfern - the telepathic AI writing tool.

I left OpenAI to build Cursor for email.

AI-driven communication isn’t authentic.
You want to communicate clearly and thoughtfully.
But wording your thoughts is time-consuming.
Not anymore. We’ve developed the world’s best autocomplete model, proudly from Europe.

Meet @lightfern_ai , the telepathic AI writing tool. It finishes your thoughts before your fingers hit the keys.

Working directly in your inbox as a browser extension, Lightfern nails the details that make emails feel like you - nicknames, sign-offs, your usual tone - and pulls context from past threads to finish your sentences the way you would.

Build stronger relationships. Lightfern keeps you thoughtful, whether it’s remembering your client’s holiday to New York or a long-forgotten invoice number.
Revise and edit directly in your inbox. And no more copy pasting from emails to your LLM. Chat directly with Lightfern in your email inbox – it sees what you see.
All this, plus zero data retention by default. Your emails, your data.

It’s unmatched in contextual awareness and speed - one user even remarked that it’s “the closest thing to telepathy” she’s experienced.

Human-first AI means human-first everything. That’s why our launch video is 100% hand-drawn: to put our money where our mouths are.

🪴Install for free today: https://t.co/g37fBJl86J. Lightfern is completely free during our beta period.

P.S. If you’re in London, drop a comment / DM to get invited to our exclusive launch event!

[Carles Reina @Carles_Reina]

This, from Superhuman, is a nice touch - I love gamification. Unfortunately, for Superhuman, there is a better Agentic email product I am using more and more now. They haven't publicly released, but it is mega impressive - congrats @lightfern_ai & @dougli_