Changelog

What's new

Release notes for Costr. Most recent first.

May 23, 2026

Transparency pages + footer

Added a full footer with links to product, legal, and company pages. New pages: About, Changelog, Cookies, and DPA. Added cross-links between Privacy, Terms, and Security. Added a “Legal stuff” section to the dashboard sidebar.

May 23, 2026

Security page

Published a detailed security page covering what Costr never stores, what it does store, how BYOK provider keys are encrypted, how Stripe restricted keys are handled, incident response, and data export/deletion.

May 23, 2026

Tier enforcement for API keys

Free accounts are now limited to 1 active API key. When a subscription is canceled or payment fails, extra keys are disabled automatically — the most recently used key is kept active. Keys re-enable when the subscription is restored. A warning banner appears in the dashboard when any keys are disabled.

May 22, 2026

Pre-launch cleanup

Terminology pass: “Cost” columns renamed to “Spend”; “Requests” renamed to “Calls” throughout. Added robots.txt and sitemap.xml. Proxy routes now return structured JSON on auth errors. Tooltip icons switched to Lucide components.

May 22, 2026

Initial launch

Costr is live. Proxy endpoints for OpenAI, Anthropic, and Google. Per-customer spend tracking, feature-level breakdown, margin overlay when Stripe revenue sync is enabled. Free, Pro, and Team tiers.

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