Loops vs Mailgun
Side-by-side comparison of AI visibility scores, market position, and capabilities
SF SaaS-focused email marketing platform at $731K monthly revenue Oct 2024 with only 3 employees; $3.7M Craft Ventures/SV Angel-backed competing with Customer.io for product-led growth email automation with native Segment/Mixpanel event integration.
About
Loops is a San Francisco-based email marketing platform built specifically for SaaS companies — backed with $3.7 million in total funding led by Craft Ventures with participation from Altman Capital, SV Angel, Liquid2, Soma Capital, Box Group, and Twenty-Two Ventures — providing software-as-a-service startups and growth-stage companies with an email platform purpose-built for product-led growth workflows: transactional email delivery, product-triggered automation sequences, newsletter campaigns, and user lifecycle marketing designed around how SaaS products acquire, activate, and retain users. Founded in 2022 by Chris Frantz and Adam Kaczmarek, Loops reached $731,400 in monthly revenue in October 2024 with only 3 employees — a $2.9 million annualized revenue run rate reflecting exceptional capital efficiency for a bootstrapped-mindset SaaS built on minimal venture funding.
Sinch-owned transactional email API processing 450B+ emails annually; 97.4% delivery rate at 95K messages/second peak competing with SendGrid for developer email infrastructure.
About
Mailgun is a transactional email API platform providing developer-friendly email sending, tracking, and deliverability infrastructure for applications — enabling developers to integrate email sending via REST API or SMTP relay for transactional emails (password resets, order confirmations, notifications, alerts) at high volume with delivery analytics and bounce handling. Acquired by Sinch (the Swedish cloud communications company), Mailgun processes 450 billion+ emails annually for 150,000+ businesses.\n\nMailgun's API-first approach targets developers who need to send emails programmatically from their applications — the platform provides deliverability infrastructure (dedicated IP management, ISP relationship management, feedback loop processing), email validation (verifying email addresses before sending), and routing and tracking (open/click tracking, bounce categorization). The Mailgun dashboard provides senders with real-time visibility into delivery rates, bounce rates, spam complaints, and engagement metrics. The platform achieved 97.4% delivery rate compared to an 84.8% industry average, with 0.42% bounce rate.\n\nIn 2025, Mailgun operates as part of Sinch's email business alongside Mailjet and SparkPost (both also acquired by Sinch) — creating a combined email infrastructure offering that covers API email, marketing email, and high-volume email sending across different use cases and market segments. Mailgun competes with SendGrid (Twilio), Postmark (ActiveCampaign), and Amazon SES for transactional email API market share. During Black Friday/Cyber Monday 2024, Mailgun delivered 7.68 billion interactions at 95,000 messages per second peak, demonstrating the scale of infrastructure required for modern email delivery. The 2025 strategy focuses on deepening developer tooling, growing in the Sinch ecosystem alongside SMS and messaging products, and maintaining deliverability leadership as inbox providers continue tightening sender requirements.
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