Meet Lumen AI · Now in public beta
Your second brain, on tap.
Lumen turns a single sentence into finished work. Draft the email, distill the report, untangle the bug - just ask, and watch it stream back, ready to ship. One calm workspace for every thought you can type.
Powering focused work at
How it works
From a thought to a result in three beats.
No prompt-engineering degree required. Type the way you think - Lumen handles the rest.
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01
Ask
Describe what you need in plain language - paste a doc, a link, or just a rough idea. Lumen reads the context with you.
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02
Lumen drafts
It reasons over your sources and streams back a structured first draft - outlines, code, summaries, replies - citations attached.
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03
You ship
Nudge it, refine a line, then send. Export to docs, Slack, or your editor in a click - your voice, your call, every time.
Capabilities
One assistant. Every kind of work.
Lumen blends reasoning, memory, and your tools into a single fast surface - so context never leaves the room.
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Smart drafting
Emails, briefs, posts, and proposals in your tone. Lumen learns your phrasing from past work and matches it line for line.
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Deep research
Ask a question, get a sourced answer - Lumen reads, cross-checks, and cites so you can trust what comes back.
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Instant summaries
Drop a thread, PDF, or recording. Get the five things that matter and the one decision you owe - in seconds.
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Code copilot
Explain a stack trace, scaffold a function, write the test. Lumen speaks fluent code across your whole repo.
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Persistent memory
Lumen remembers your projects, preferences, and people - so every answer starts where you left off, never from scratch.
Built for the way you work
A teammate for every desk.
Whatever the discipline, Lumen meets the workflow where it already lives.
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Writing
Marketers & founders
Turn a bullet list into a launch post, a newsletter, and three subject lines - all in one pass.
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Research
Analysts & PMs
Compare vendors, synthesize user interviews, and build the brief with sources you can defend.
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Summaries
Operators & leads
Inbox zero, meeting notes, and weekly digests written for you while you focus on the call.
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Code
Engineers & builders
Pair on the tricky function, draft the migration, and document the API without leaving flow.
Pricing
Start free. Scale when it earns its keep.
Simple per-seat plans, billed monthly. Cancel anytime - your work always exports cleanly.
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Free
$0/ forever
For curious solo minds getting started.
- 40 assists per day
- Drafting, summaries & chat
- 3 saved memories
- Community support
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Most popular
Plus
$16/ seat · mo
For professionals who live in their work.
- Unlimited assists
- Deep research with citations
- Code copilot & file uploads
- Unlimited persistent memory
- Priority streaming speed
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Team
$24/ seat · mo
For teams that think and ship together.
- Everything in Plus
- Shared memory & workspaces
- Admin controls & SSO
- SOC 2 & data residency
- Dedicated success manager
Loved by people who ship
The quiet upgrade to every workday.
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★★★★★
"Lumen reads my messy notes and hands back a clean brief in my own voice. It's the first AI tool my whole team actually keeps open all day."
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★★★★★
"I paste a stack trace and get a real explanation plus a passing test. It's shaved hours off my week - research that used to take an afternoon is a coffee break now."
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★★★★★
"The persistent memory is the magic. Lumen knows our roadmap and glossary, so every summary lands in context. It feels less like a tool and more like a sharp new hire."
Questions
Answers before you ask.
Still curious? Email hello@lumen.ai and a human replies within a day.
Never. Your prompts, files, and memories are private to your workspace and are not used to train any model. On Team plans you also get data-residency controls and a signed DPA.
Lumen routes each request to a best-fit frontier model behind the scenes, so you always get the strongest reasoning for the task without choosing a model yourself. We upgrade the lineup as new releases land.
Yes. Lumen connects to Google Drive, Notion, Slack, GitHub, and your browser, and exports straight to docs or your editor. Anything you can paste, it can read.
Nothing breaks - your assists simply pause until the next day, or you can upgrade to Plus for unlimited use. No surprise charges, ever, and you can downgrade whenever you like.
Meet your second brain today.
Start free in two minutes - no credit card, no setup call. Bring one nagging task and let Lumen take the first pass.
- Free forever plan
- Cancel anytime