Meet Sol, your brightest assistant.
Ask anything and get clear, thoughtful answers in seconds. Writing, coding, planning, learning — Sol keeps up with all of it.
No credit card required · Free plan forever
Imagine you're standing in a line of people, and you want to know your spot. You can't see the front — so you tap the person ahead and ask “what's your number?”
They ask the person ahead of them, and so on. When the very first person says “I'm #1,” the answers ripple back until you get yours. That's recursion: a problem that solves itself by asking a smaller version of the same question.
Everything you want from an AI chat
Fast, capable, and refined down to the last detail.
Answers that stream
Replies appear word by word — no staring at a spinner waiting for a wall of text.
Genuinely capable
Powered by frontier models for writing, coding, analysis, and working through hard problems.
Your chats stay yours
Conversations are private to your account and never used to train models.
History that follows you
Every conversation is saved and searchable, on any device you sign in from.
Light & dark, your call
A warm light mode, a deep dark mode, or match your system — switch anytime.
Clean, focused interface
No clutter, no noise. Just a fast, beautiful place to think out loud.
Up and running in a minute
Create a free account
Sign up in seconds — no credit card needed to start.
Ask Sol anything
Draft an email, debug code, plan a trip, learn a concept. Sol keeps up.
Upgrade when you need more
Hit your stride? Pro unlocks a smarter model and far higher daily limits.
One assistant, endless uses
Writing
Emails, posts, essays, rewrites, and brainstorms — in your voice.
Coding
Explain code, fix bugs, write tests, and learn new frameworks fast.
Learning
Break down hard topics into plain language, at exactly your level.
Planning
Trips, projects, schedules, and decisions — organized and clear.
Simple, honest pricing
Start free. Upgrade only when Sol becomes part of your day.
Free
$0/ free forever
Everything you need to get started.
Pro
$15/ month
For people who use Sol every day.
Questions, answered
Is Sol AI free to use?
Yes. You get a set number of messages every day on the Free plan with no credit card required. Pro raises the limit substantially and uses a more capable model.
What can I use it for?
Writing, coding, learning, research, planning, and everyday questions. Sol is a general-purpose assistant — if you'd ask a sharp, well-read friend, you can ask Sol.
Are my conversations private?
Your chats are tied to your account and are not shared publicly or used to train models. You can delete any conversation at any time.
Can I cancel Pro anytime?
Absolutely. Manage or cancel your subscription in one click from your settings — you keep Pro until the end of the period you've paid for.
What powers Sol?
Sol runs on frontier large language models, with a faster model on Free and the most capable model on Pro.
Ready to think a little brighter?
Join in and start your first conversation with Sol. It's free, and it takes less than a minute.