VULK
Native BYOM with zero markup on Max + Business.
Comparison
AI app builders with BYOM and zero markup (2026)
If your usage is predictable, paying a SaaS tier markup on top of model costs is wasteful. Bring Your Own Model (BYOM) routes prompts through your own API keys, billing you direct from the provider. Here are the AI app builders that support BYOM honestly — no hidden uplift, no rate-limited fall-back to your tier.
Last verified 2026-04-30 · See sources below
Why VULK fits
- +BYOM on Max + Business plans — zero markup on Anthropic / OpenAI / Google / xAI keys
- +Per-task model routing — pick Opus for complex generation, Flash for cheap edits
- +Side-by-side cost reporting (your API spend vs. your VULK plan)
- +Compatible with Vercel AI Gateway, OpenRouter, custom endpoints
The shortlist
Cline
github.com/cline/cline ↗Open-source VS Code extension — BYOM by design.
Continue.dev
continue.dev ↗Open-source coding assistant — BYOM-first.
Cursor
Pro tier supports BYOM but with limits.
Bolt.new
No BYOM — token credits per plan only.
FAQ
What's the catch with most builders?
They charge a token markup (often 2-3×) baked into your monthly fee, then enforce a daily cap to prevent abuse. BYOM removes the markup but you pay your own API spend directly.
Is BYOM cheaper for me?
If you generate heavily, yes — usually 30-60% lower total cost. If you generate 1-2 apps per month, the bundled tier is fine.