Built for AI power users
Ask once. Get one best answer.
LettiB is the AI workspace for power users who use ChatGPT, Claude, Gemini, and more. Compare answers side by side, then synthesize them into one merged answer. Organize everything in projects with your team.
Synthesis
Not just compare — merge all answers into one final best answer.
No Setup Friction
Free tier includes monthly credits. Start comparing instantly, no API keys required.
Your Choice
Bring your own API keys for full control, or use managed credits and pay only for what you use.
Why a single chat window is not enough
Scattered across tabs
ChatGPT here, Claude there, Gemini in another window — context lost every time you switch.
Rate limited and tracked
Hit caps mid-workflow. Your prompts train someone else's model. Privacy is an afterthought.
No way to organize your best work
Great answers disappear in endless threads. Nothing compounds into a knowledge base.
How LettiB works
Three steps to a smarter AI workflow.
Ask one question
Start instantly with included credits — or connect your own API keys. No setup required.
Compare answers side by side
Send one prompt to up to 6 models in parallel. Watch every response stream live.
Synthesize the best answer
Merge the strongest ideas into one authoritative answer — saved to your project forever.
What you get
Synthesis first — then compare, organize, and remember.
One final answer, built from the best of all models.
Don't pick a winner — combine them. Synthesis merges attributed insights into a single polished response you own.
Ask once. Get one best answer.
Stop paying stack tax — no more tab-switching between ChatGPT and Claude. Run the same prompt across models, then synthesize one best answer.
Your AI work, organized.
Group chats, compares, and syntheses by project. Search everything. Build a library that grows with you.
Every project remembers what matters.
Goals, decisions, preferences, and facts accumulate automatically — so every new prompt starts smarter.
Ask once. Get one best answer.
Compare is the starting point. Group Synthesis and Me-Mic are how a pile of model output becomes one piece of work in your voice.
Different jobs, one deliverable
Give several AIs different jobs on the same task, then merge their work into one deliverable.
How Group Synthesis worksRewrite so it sounds like you
Rewrites any LettiB output in your own writing voice from a writing sample saved in Settings → Me-Mic. Original kept. Not AI-detection.
How Me-Mic worksWhy LettiB
Side-by-side compare is table stakes. Synthesis is the difference.
| Feature | LettiB Pro | Aymo Premium | ChatGPT Teams |
|---|---|---|---|
| Price/month | $15 | $12 | $30/person |
| Side-by-side compare | Yes | Yes | No |
| Merge into one answer (Synthesis) | Yes | No | No |
| Projects + folders | Yes | Yes | No |
| Bring your own API keys | Optional | Business tier only | No |
LettiB's Synthesis feature is unique — it doesn't just show you every answer, it creates one merged final answer.
Your keys. Your data. Your rules.
LettiB never trains on your conversations. Your API keys are encrypted and never shared. You own everything you create — export, delete, or leave anytime.
Simple, transparent pricing
Ask once. Get one best answer. Start with included credits, or bring your own API keys. Top up with $10 / $25 / $49 packs anytime.
Free
300 credits/month — about 30 chat messages or 6 compare runs
- Managed credits included — no API keys required
- BYOK optional — unlimited providers
- Compare up to 2 models at once
- 5 projects
- Synthesis (10 / month)
- 7-day history
Pro Monthly
15,000 credits/month — about 1,500 chat messages or 75 compare runs
- Everything in Free
- Compare up to 4 models at once
- Unlimited projects
- Unlimited Synthesis
- Project Memory
- Unlimited history & search
Power Monthly
35,000 credits/month — about 3,500 chat messages or 175 compare runs
- Everything in Pro
- Compare up to 6 models at once
- Custom AI Teams
- Shareable synthesis links
- Priority synthesis queue
- Priority support
Lifetime BYOK
- Everything in Power
- Single payment — no renewals
- BYOK — unlimited providers
- Best for long-term solo power users
Credit packs
Top up managed credits on Free or paid — $10, $25, or $49. Ask once. Get one best answer.
$10
$25
$49
Workspace from $15/mo Pro, $35/mo Power, or $79 lifetime. Credit packs: $10 / $25 / $49. Use managed credits or your own provider keys.
FAQ
Do I have to bring my own API keys?+
No. Free, Pro, and Power include monthly credits so you can start immediately. Bring your own keys anytime for full control and provider-direct billing — or choose Lifetime BYOK for unlimited usage with your own keys.
Which AI providers are supported?+
OpenAI (GPT-5.x), Anthropic (Claude Sonnet & Opus), Google (Gemini), Groq, DeepSeek, Perplexity, and xAI (Grok). Custom OpenAI-compatible endpoints work too.
Is my data private?+
Yes. Your keys are encrypted in Supabase Vault. We never train on your conversations. You own everything you create.
Can I cancel anytime?+
Pro and Power are month-to-month — cancel from the billing portal anytime. Lifetime BYOK is a one-time purchase with no renewals.
What is LettiB Synthesis?+
After comparing multiple models, Synthesis merges the best parts into one final answer with source attribution — like having an editor for your AI outputs.
Ready to own your AI workflow?
Compare every model, then synthesize one answer you can keep.
Start Free — No Credit Card