# ActiveCampaign vs Klaviyo API + MCP (slim)

> Klaviyo API + MCP scores 71.7 (BB) on agent readiness against ActiveCampaign's 50.5 (D), and leads in 5 of 7 scored categories. ActiveCampaign leads on payments & pricing. Both do marketing profiles. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/activecampaign-vs-klaviyo.md (~2,150 tokens) · this version ~780 tokens · JSON https://www.anchorterminal.com/compare/activecampaign-vs-klaviyo.json · canonical https://www.anchorterminal.com/compare/activecampaign-vs-klaviyo
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-08

Klaviyo API + MCP scores 71.7 (BB) on agent readiness against ActiveCampaign's 50.5 (D), and leads in 5 of 7 scored categories. ActiveCampaign leads on payments & pricing. Both do marketing profiles.

- ActiveCampaign: D 50.5, rank #516 of 629 · https://www.anchorterminal.com/tools/activecampaign.min.md
- Klaviyo API + MCP: BB 71.7, rank #98 of 629 · https://www.anchorterminal.com/tools/klaviyo.min.md
- ActiveCampaign, good for Small and mid-sized teams already on ActiveCampaign that want an agent to maintain contacts, segments and campaign drafts and enrol contacts in automations. Ahead on Payments & pricing, 30 against 25. Also Free to start without a card.
- Klaviyo API + MCP, good for Consumer brands already on Klaviyo that want an agent to read campaign and flow results, manage profiles, events and segments, and draft campaigns. Ahead on Schema & documentation, 87 against 68; Agent ergonomics, 78 against 52; Security & auth, 84 against 33; Maintenance & community, 77 against 35; Transparency & trust, 79 against 57. Also Agent-ready, a grade of BB or better; A hosted endpoint, with nothing to install; Runs on your own machine.

| Category | ActiveCampaign | Klaviyo API + MCP |
| --- | --- | --- |
| Reliability (16%) | 67 | 67 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 68 | 87 |
| Agent ergonomics (13%) | 52 | 78 |
| Security & auth (14%) | 33 | 84 |
| Payments & pricing (10%) | 30 | 25 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 35 | 77 |
| Transparency & trust (7%) | 57 | 79 |

| Fact (where they differ) | ActiveCampaign | Klaviyo API + MCP |
| --- | --- | --- |
| Vendor | ActiveCampaign, LLC | Klaviyo, Inc. |
| Hosted endpoint | no (local only) | `https://a.klaviyo.com` |
| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP, stdio |
| Pricing | Paid | Freemium |
| Price for marketing profiles | not published | $20 per month (plan) |
| Licence | Proprietary service under ActiveCampaign's terms of service and API licence agreement | Proprietary service under Klaviyo's terms of service and API terms. The OpenAPI repository and the klaviyo-api SDKs are MIT |
| Tools exposed | 50 | 274 |
| Read-only variant documented | no | yes |
| Last release | 2026-09-02 | 2026-07-15 |
| Terms last updated | 2025-12-23 | 2025-12-17 |
| Privacy policy last updated | 2026-10-01 | couldn't be read |
| Customer content may train models | yes | not found in the text |
| Terms restrict automated access | yes | not found in the text |
| Terms restrict benchmarking | not found in the text | yes |
| Terms or service can change without notice | yes | not found in the text |
| Arbitration or class-action waiver | yes | not found in the text |
| Popularity | none | 153k npm/wk, 74k PyPI/wk |