Overview
Selzy and SendGrid serve different purposes. Selzy is email marketing for business users. SendGrid is email infrastructure for developers. For our take on each, see our Selzy comparison and SendGrid comparison.
Different Tools, Different Jobs
SendGrid sends transactional email (password resets, receipts, notifications) through APIs and SMTP. Selzy sends marketing email (campaigns, newsletters, promotions) through a visual interface. Most businesses that need both end up using two tools.
Where They Overlap
Both can send marketing emails, but their strengths are different. Selzy's marketing tools are more developed with AI features and better campaign management. SendGrid's marketing feels like an afterthought next to its infrastructure.
The Sequenzy Alternative
For SaaS founders who want transactional and marketing email in one tool, Sequenzy combines transactional email and marketing campaigns with Stripe integration at $49/month.
The Two-Tool Problem
Many businesses end up running SendGrid for transactional email and a marketing platform like Selzy for campaigns. This two-tool approach works but introduces friction: two dashboards, two sets of analytics, two sender reputations to manage, two bills to pay, and two platforms to learn.
The combined cost of SendGrid ($19.95/month) plus Selzy (~$55/month) is about $75/month. A unified platform like Sequenzy handles both for $49/month. The cost savings are modest, but the operational simplification of one platform is significant, especially for small teams.
The two-tool approach makes sense when you need SendGrid's enterprise-grade infrastructure for high-volume transactional email alongside a dedicated marketing platform. For businesses sending tens of millions of transactional emails, SendGrid's reliability and scale are worth the separate tool.
Developer Tools vs Marketing Tools
SendGrid is built by developers for developers. REST APIs, SMTP relay, webhooks, email validation, IP management, and detailed event tracking. Every interaction is programmable. Marketing teams using SendGrid for campaigns find the experience frustrating because the platform prioritizes developer workflows.
Selzy is built by marketers for marketers. Drag-and-drop builders, AI content creation, visual campaign management, and template libraries. Developers using Selzy for API integration find the experience limiting because the platform prioritizes marketing workflows.
This divide reflects different organizational needs. Engineering-led companies naturally gravitate toward SendGrid's developer tools. Marketing-led companies naturally prefer Selzy's visual tools. The best choice depends on who in your organization owns the email function.
Deliverability Infrastructure Gap
SendGrid has invested heavily in deliverability infrastructure over many years. Dedicated IP addresses, IP warming schedules, sender authentication tools, reputation monitoring, and email validation. These features matter most for high-volume senders where inbox placement directly impacts business outcomes.
Selzy provides basic deliverability features sufficient for typical marketing volumes. Shared IP pools, standard authentication, and bounce handling. For most small businesses sending a few thousand emails per month, Selzy's deliverability is adequate.
The gap matters when you scale. At 100,000+ emails per month, deliverability optimization becomes critical. SendGrid's dedicated IPs and warming tools maintain inbox placement at volumes where shared infrastructure struggles. If your email program will grow to high volumes, factor deliverability infrastructure into your platform decision. Use our email validator to reduce bounces and protect your sender reputation on either platform.