✓ Quartzite
A unified chat interface for accessing GPT, Claude, Gemini, and other AI models using your own API key.
Why we recommend them
Quartzite is a bring-your-own-API-key chat interface that gives access to multiple AI models (GPT-5.1, Opus 4.5, Gemini 3, o3-pro, DeepSeek, Perplexity, and more) in one app. It's aimed at users who want advanced prompting tools—like a Markdown editor, version history, templates, and cost previews—for research, writing, or complex tasks, without paying for multiple separate subscriptions.
✓Requires your own API key; you pay model providers directly for usage instead of a flat subscription
✓Early Supporter Plan priced at $3.99/month (locked in), discounted from $7.99
✓Includes prompt version history, cost preview, template library, and an AI-powered prompt optimizer
What we actually verified
8/10 TrustScore—Money-back guarantee verified
—Free trial available
✓Reachable customer service“…Privacy Policy or our data practices, please contact us at [email protected]. By using the our App and Website, you acknowl”
✓No fine-print return conditions
✓No unrealistic claims detected
Vetted 2026-07-13 · How we vet →
Common questions about Quartzite
Is Quartzite legit and safe to buy from?
Yes — Quartzite passed the WhatiseBrokering.com vetting checklist (try before you buy, no fine-print returns, a real way to reach them, realistic claims only) before being listed. We remove companies that stop meeting the standard.
Can I try Quartzite before committing, or get my money back?
Every company in our directory must offer a free trial or, at minimum, a 7-day money-back guarantee from the day your product arrives — with no fine-print return conditions like "unopened" or "original packaging". Quartzite met this requirement at the time of vetting.
How do I reach Quartzite if something goes wrong?
Quartzite publishes a real customer-service contact (phone or email) — that's a listing requirement. If you can't get a response, tell us at [email protected] and we'll review their listing.
Why is Quartzite listed on WhatiseBrokering.com?
We discovered and vetted Quartzite ourselves. They don't pay us anything — they're listed purely because they meet the standard.
Had a bad experience with Quartzite?
This directory only works if every listing keeps earning its place. If Quartzite didn't live up to the standard — refused a return, unreachable support, misleading claims, anything — tell us. We'll re-review them against our vetting criteria, and if they're not abiding by our rules, we remove the listing. No exceptions, no pay-to-stay.