Doppler vs Phase

Doppler is a secrets manager for storing and managing sensitive application secrets through a dashboard, API, and command-line tool. It centralizes secret management with config syncs, secret referencing, and automatic rotation on eligible plans. Its MCP server lets AI agents request secrets natively, and Doppler says per-seat pricing adds no fees for AI agents or other non-human identities. Developers can use a CLI, SDKs, API, webhooks, and a VS Code extension with two-way sync. Listed integrations include AWS Secrets Manager, Terraform Cloud, GitHub Actions, Kubernetes, GCP Secret Manager, Azure Key Vault, Vercel, and Okta. Security controls include scoped tokens, fine-grained access, breach detection, encrypted fallback files, and trusted IP allow lists. Doppler says it encrypts and tokenizes secrets using AES-256-GCM and is SOC 2 and ISO 27001 certified. Deployment is available in the cloud or on-prem. The Developer plan is free for three users, with additional users at $8 a month. Team costs $21 per user per month and is free for 14 days. Enterprise pricing is custom.

Phase is an open-source platform for managing application secrets from development through production. It runs as a managed cloud service or on your infrastructure, including in air-gapped environments. Phase says end-to-end encryption is enabled by default, with servers storing ciphertext in that mode. Its CLI keeps secrets encrypted at rest locally and can inject them while offline; it also installs skills for Claude Code, Codex, Cursor, OpenCode, and VS Code Copilot to work with secrets using natural language. Teams can assign managed or custom roles by app and environment, set IP allow-lists, review records of access and changes, and use point-in-time rollback. Integrations include AWS, Azure, HashiCorp Vault, Docker, Kubernetes, Cloudflare, GitHub, GitLab, Vercel, and Railway. Phase lists SOC 2 Type 2 and penetration testing by Oneleet. The Free plan is limited to 5 users or service accounts, 3 apps, and 3 environments. Pro costs $10 per month, billed annually at $120 ($144 shown), with a 14-day trial.