Aster Mail vs VibeMail

Aster Mail is an open-source email service with a free plan and paid tiers. It supports web, desktop, and Android, with an iOS beta on TestFlight; native desktop apps are available for Windows, Mac, and Linux. Aster Bridge lets desktop mail apps connect over IMAP and SMTP. Mail between Aster accounts is automatically end-to-end encrypted and uses hybrid post-quantum encryption. The free plan costs nothing and includes 10 GB of encrypted storage, five aliases, one custom domain, two mail rules, attachments up to 25 MB per message, and Bridge access; no trial or credit card is required. Aster says its email is hosted in Germany under EU privacy law and that it does not use ads, inbox scanning, or AI on the inbox. QuickSwitch imports mail from Gmail, Outlook, Yahoo, Proton, and other IMAP providers. MBOX mailbox export is free on every plan. Paid plans start at $2.42 a month, billed annually, with the final amount determined at checkout. Aster Mail was founded in 2026 and is headquartered in Orlando, Florida, United States.

VibeMail provides encrypted private email with multiple addresses, custom domains, and a transactional email API. It runs on Android, iOS, web, and through an API. Message bodies are encrypted at rest and in transit; the maker says it cannot read mail sealed with a password-derived key. Each alias has its own encryption identity. VibeMail says it shows no ads, does not profile users, and does not train models on customer mail. Incoming mail is scanned for spam and malware before encryption. The API supports templates, webhooks, delivery tracking, and suppression handling, with SDKs for TypeScript, Python, Go, and Rust, plus MCP and REST access. IMAPS, submission, and POP3S are supported, and the maker says Apple Mail, Gmail, and Outlook on mobile can connect through IMAP and SMTP. The free plan costs nothing forever with one encrypted address, 500 MB storage, and web access. Paid plans start at $2.99 a month; overage sends cost $0.60 per 1,000.