Posta vs ReachMail

Posta is a free, AGPL-3.0 self-hosted platform for sending and receiving email through an HTTP API. It supports API sending, SMTP relay, inbound mail, and website form submissions. The REST API handles transactional, batch, and templated messages with attachments, scheduling, retries, and priority queues. Incoming mail can arrive through built-in SMTP with TLS or an authenticated webhook, with forwarding and real-time SSE notifications. Templates offer versioning, localization, visual editing, and preview; campaigns add scheduling, A/B testing, and send-rate throttling. Posta supports multiple SMTP providers, SPF, DKIM, and DMARC verification, plus SDKs for Go, PHP, Java, and .NET. Security controls include hashed API keys, optional expiration and IP allowlists, JWT authentication, roles, two-factor authentication, rate limiting, and session management. It runs on customer infrastructure, with Docker Compose startup, isolated workspaces, data import/export, and GDPR deletion tools.

ReachMail provides email marketing and transactional email delivery through its web platform and API. Campaign tools include drag-and-drop and WYSIWYG editors, templates, and a spam checker. Audience features cover contact management, list imports, signup forms, and both list and dynamic segmentation. Automation includes drip campaigns, automated messages, customer journeys, and advanced automation features. Reporting tracks opens, clicks, bounces, and engagement; relay reports are available through the interface, API, and webhooks. The SMTP and API relay is presented for marketing, apps, websites, transactional notifications, and devices such as printers and security systems. ReachMail says messages are signed automatically with DKIM and SPF, and supports custom DKIM, SPF, and branded tracking domains. Listed integrations include Zapier, Facebook, Twitter, LinkedIn, Google Analytics, Matomo, OpenWebAnalytics, and Orbi. The free plan covers fewer than 5,000 contacts and fewer than 15,000 emails per month. Paid plans start at $8/mo, and a 14-day trial is offered. New accounts receive 250 free relay credits. ReachMail is based in San Diego and says it serves small businesses, nonprofits, community organizations, and Fortune 500 companies.