| Price from | $10/mo | $13/mo |
| Free plan | — | Yes |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | Yes | Yes |
| Plans published | 5 | 5 |
| Spec score · Marketing Automation Software | 8.6 (#21) | 9.3 (#2) |
| API | Kizen provides REST APIs for data access, activity scheduling and logging, workflow triggers and system integrations. | Mailchimp exposes open Marketing and Transactional APIs authenticated with OAuth or API keys. |
| Company history | Kizen says it was founded in 2018 by co-founders John Winner and Scott Turner. | Mailchimp was founded in Atlanta in 2001 by Ben Chestnut and Dan Kurzius. |
| Company size | LinkedIn reports a company size of 51–200 employees. | LinkedIn lists Mailchimp as an Atlanta-based private company with 1,001–5,000 employees. |
| Email automation | Yes | Yes |
| Integrations | Kizen advertises connections to more than 1,000 tools through Zapier, webhooks and native connectors. | Mailchimp advertises more than 300 integrations, including Shopify, WooCommerce, Canva, Zapier, Salesforce, WordPress, Stripe and QuickBooks Online. |
| Rating on Apple App Store | 5.0 out of 5 from 3 ratings | 4.9 out of 5 from 52K ratings |
| Rating on Capterra | 5.0 out of 5 from 1 review | 4.5 out of 5 from 17,528 reviews |
| Rating on G2 | 4.4 out of 5 from 35 reviews | 4.3 out of 5 from 18,430 reviews |
| Rating on Software Advice | 5.0 out of 5 from 1 review | 4.5 out of 5 from 17,681 reviews |
| Rating on Trustpilot | 3.3 out of 5 from 1 review | 2.5 out of 5 from 1,522 reviews |
| SDKs | The developer site documents a built-in kizen.api client for workflow code steps but does not list a separately downloadable SDK. | Official client libraries cover TypeScript, Python, Go, Java, C#, PHP, Ruby, Swift and Rust; mobile SDKs target iOS and Android. |
| Support | Kizen's support center offers a knowledge base, community forums, and support ticket submission. | Official feature pages state 24/7 service and support, with onboarding specialists and customer-success services for paid customers. |
| What it does | Kizen describes itself as an agentic orchestration system that embeds AI into enterprise workflows, especially for regulated industries. | Mailchimp is an email and marketing-automation platform for growing businesses, combining email, social, landing pages, advertising and AI recommendations. |
