Mailchimp records 10,071,636 monthly visits with +1.1% month-over-month growth and Freemium pricing. OpenFlowKit records 1,437 monthly visits with -70.3% growth and Free pricing.
AI-assisted email and SMS marketing that turns audiences into customers
The open-source diagramming studio for builders
| Dimension / Metric | | |
|---|---|---|
| Official Domain | mailchi.mp | openflowkit.com |
| Pricing Model | Freemium | Free |
| Monthly Visits | 10.07M (10,071,636) | 1.44K (1,437) |
| MoM Traffic Delta | +105.62K (+1.1%) | -3.41K (-70.3%) |
| Primary Market & Share | 🇺🇸 United States (54%) | 🇻🇳 Vietnam (92.4%) |
| Direct Visits / mo | 5.77M | 614 |
| User Rating | 4.4 | 4.6 |
| Supported Platforms | Website | Website |
AI-assisted email and SMS marketing that turns audiences into customers
Drag-and-drop templates, reusable layouts, and guided steps to design and send newsletters or promotional emails without a designer.
Build automated journeys triggered by signups, purchases, birthdays, or inactivity, including welcome and abandoned-cart series.
Generate draft copy and subject lines, and use data-driven send-time suggestions to improve engagement.
Tag, segment, and filter contacts, and track engagement history in a searchable audience database.
The open-source diagramming studio for builders
Paste a public GitHub repository and OpenFlowKit reads its files in the browser to draw modules and connections, with every arrow cited to the source line it came from.
29 diagram tools for Claude Code, Codex, Cursor, VS Code, Windsurf or any MCP client, so an agent can draw on the diagram you have open, one undo away.
Write or paste Mermaid, D2 or Structurizr; the text and the canvas remain the same diagram, so you can round-trip between syntax and visuals.
Move from system context to containers to components in linked views that all stay grounded in a single architecture model.
Provides deeper e-commerce data integration and advanced segmentation, but steeper learning curve than Mailchimp.
Provides deeper e-commerce data integration and advanced segmentation, but steeper learning curve than Mailchimp.
Offers robust multi-channel marketing and transactional emails, but with simpler CRM workflows than Mailchimp.
Offers robust multi-channel marketing and transactional emails, but with simpler CRM workflows than Mailchimp.
Features a cleaner, more intuitive drag-and-drop editor, but fewer advanced enterprise automation features.
Features a cleaner, more intuitive drag-and-drop editor, but fewer advanced enterprise automation features.
Includes built-in landing page builders and webinars, but interface feels busier than Mailchimp.
Includes built-in landing page builders and webinars, but interface feels busier than Mailchimp.
SpecialistSpecializes in cold email outreach and deliverability infrastructure rather than inbound newsletter marketing.
SpecialistSpecializes in cold email outreach and deliverability infrastructure rather than inbound newsletter marketing.
AI diagrams and technical design docs built from your code and systems
AI diagrams and technical design docs built from your code and systems
Delivers vastly more powerful CRM and complex automation workflows, but less beginner-friendly interface.
Delivers vastly more powerful CRM and complex automation workflows, but less beginner-friendly interface.
AI diagramming, mind mapping and project tools with 50,000+ templates
AI diagramming, mind mapping and project tools with 50,000+ templates
SpecialistExcels at generating enterprise-grade on-brand marketing content, but lacks native email delivery infrastructure.
SpecialistExcels at generating enterprise-grade on-brand marketing content, but lacks native email delivery infrastructure.
Free / Open-sourceOpen-source AI automation that unifies agents, flows and 770+ app integrations
Free / Open-sourceOpen-source AI automation that unifies agents, flows and 770+ app integrations
AI-powered visual collaboration for diagrams, mind maps, and charts
AI-powered visual collaboration for diagrams, mind maps, and charts
One AI workspace for diagrams, docs, whiteboards and project delivery
One AI workspace for diagrams, docs, whiteboards and project delivery
