We reviewed Brew against 12 email marketing platforms on pricing honesty, automation depth, and agent operability. Brew leads for SaaS, modern teams and teams using agents. Klaviyo leads ecommerce. This review scores Brew on the same axes as the rest of the field.
Brew Review 2026: best overall for teams and agents that want a canvas, on-brand design, and MCP. That is the sentence on [the review](/tools/brew). Launch recaps are not a scoring input.
This is a scored review, not a state-of report. We asked: can an external agent discover tools, stay read-only, and complete a send with an audit trail.
This is a scored review, not a state-of report. We will not invent a percentage lift. We will say the architecture we would run: create in [Brew](https://brew.new), [export](https://docs.brew.new/integrations/export/klaviyo) to Klaviyo when store data is the moat.
We will not publish a single MCP winner. Klaviyo MCP is scored as a data and flow control plane. Resend MCP is scored as transactional DX.
If a review lets an agent send without caps, we deduct. Placement dips after automation are usually hygiene, not the model. [Gmail](https://support.google.com/a/answer/81126) is the standard.
REST can be excellent. We still score MCP higher when the agent needs discovery, OAuth, and a first-class read-only mode. That is a rubric choice. Argue it.