Bring Your Own Key No Lock-in · Full Control

Tech-forward AI book writing. €19/mo.

ArcWriter is the BYOK AI book writing app for developers, writers, and anyone who wants premium AI without premium pricing. Bring your own OpenAI, Claude, or OpenRouter keys. Run local models via Ollama. Fiction, nonfiction, and everything in between — all for a flat €19/month.

⚡ BYOK = Bring Your Own Key. Use your existing API keys or run local AI. No hidden usage fees. No surprise bills.

⬇ Get ArcWriter See How It Works →

19€/mo BYOK 3 Projects Local AI

Use Cases

Built for how you write

ArcWriter adapts to your workflow — whether you're a novelist, a technical writer, or somewhere in between.

What You Get

Everything you need — nothing you don't

ArcWriter includes the core tools for serious writing. Here's exactly what's included and what's not.

Simple Pricing

One plan. Fair price.

No tiers, no upsells, no nonsense. Just one straightforward plan that covers everything ArcWriter offers.

Frequently Asked Questions

Everything you need to know about ArcWriter.

Tech-forward AI book writing. €19/mo.

Built for how you write

Everything you need — nothing you don't

One plan. Fair price.

Frequently Asked Questions

Ready to write your way?