What are the major ESPs on the market?

The ESP landscape spans from small-business tools to enterprise platforms. For small to mid-size businesses: Mailchimp (widely known, good for beginners), Klaviyo (popular for e-commerce), ActiveCampaign (strong automation), Smaily (European, clean UX and ease of use), and ConvertKit (creator-focused).

For mid-market and enterprise: HubSpot (integrated CRM and marketing), Braze (cross-channel engagement), Iterable (growth marketing focus), Customer.io (behavioral messaging), and Salesforce Marketing Cloud (enterprise suite).

For transactional and developer-focused sending: SendGrid (now part of Twilio), Mailgun, Postmark (deliverability-focused), Amazon SES (low cost, AWS integration), and SparkPost (high volume).

Each has different strengths. Klaviyo excels at e-commerce integrations; Braze handles mobile push alongside email; Postmark prioritizes transactional deliverability over marketing features. Choose based on your use case, not brand recognition.

Need personalized help?

Find the right ESP for you. Open an AI assistant with your question pre-loaded — just add your details and send.

ChatGPT Claude Gemini Perplexity

Was this answer helpful?

Thanks for your feedback!