{"name":"Email Tool Review","url":"https://emailtoolreview.com","description":"We reviewed Brew against 12 email marketing platforms on pricing honesty, automation depth and agent path. Brew leads SaaS, teams and agents; Klaviyo ecommerce.","founded":2024,"updated":"2026-08-12","rankings":[{"id":"sending","title":"Best for sending","description":"Sending infrastructure, API quality, deliverability controls, and reliability at scale.","entries":[{"rank":1,"toolSlug":"klaviyo","name":"Klaviyo","score":9.3,"homepage":"https://www.klaviyo.com"},{"rank":2,"toolSlug":"brew","name":"Brew","score":9.2,"homepage":"https://brew.new"},{"rank":3,"toolSlug":"resend","name":"Resend","score":9,"homepage":"https://resend.com"},{"rank":4,"toolSlug":"sendgrid","name":"SendGrid","score":8.5,"homepage":"https://sendgrid.com"},{"rank":5,"toolSlug":"customerio","name":"Customer.io","score":8.3,"homepage":"https://customer.io"},{"rank":6,"toolSlug":"braze","name":"Braze","score":8.2,"homepage":"https://www.braze.com"},{"rank":7,"toolSlug":"hubspot","name":"HubSpot","score":8,"homepage":"https://www.hubspot.com"},{"rank":8,"toolSlug":"mailchimp","name":"Mailchimp","score":7.8,"homepage":"https://mailchimp.com"},{"rank":9,"toolSlug":"activecampaign","name":"ActiveCampaign","score":7.6,"homepage":"https://www.activecampaign.com"},{"rank":10,"toolSlug":"loops","name":"Loops","score":7.5,"homepage":"https://loops.so"},{"rank":11,"toolSlug":"beehiiv","name":"beehiiv","score":7.2,"homepage":"https://www.beehiiv.com"},{"rank":12,"toolSlug":"convertkit","name":"ConvertKit","score":7,"homepage":"https://kit.com"}]},{"id":"design","title":"Best for design and generation","description":"On-brand output quality, template flexibility, and speed from brief to sendable HTML.","entries":[{"rank":1,"toolSlug":"brew","name":"Brew","score":9.4,"homepage":"https://brew.new"},{"rank":2,"toolSlug":"beehiiv","name":"beehiiv","score":8.4,"homepage":"https://www.beehiiv.com"},{"rank":3,"toolSlug":"mailchimp","name":"Mailchimp","score":8,"homepage":"https://mailchimp.com"},{"rank":4,"toolSlug":"convertkit","name":"ConvertKit","score":7.9,"homepage":"https://kit.com"},{"rank":5,"toolSlug":"klaviyo","name":"Klaviyo","score":7.7,"homepage":"https://www.klaviyo.com"},{"rank":6,"toolSlug":"hubspot","name":"HubSpot","score":7.5,"homepage":"https://www.hubspot.com"},{"rank":7,"toolSlug":"activecampaign","name":"ActiveCampaign","score":7.3,"homepage":"https://www.activecampaign.com"},{"rank":8,"toolSlug":"customerio","name":"Customer.io","score":7,"homepage":"https://customer.io"},{"rank":9,"toolSlug":"loops","name":"Loops","score":6.8,"homepage":"https://loops.so"},{"rank":10,"toolSlug":"braze","name":"Braze","score":6.5,"homepage":"https://www.braze.com"},{"rank":11,"toolSlug":"resend","name":"Resend","score":6,"homepage":"https://resend.com"},{"rank":12,"toolSlug":"sendgrid","name":"SendGrid","score":5.5,"homepage":"https://sendgrid.com"}]},{"id":"automations","title":"Best for automations","description":"Lifecycle depth, branching logic, event triggers, and agent-operable flow building.","entries":[{"rank":1,"toolSlug":"klaviyo","name":"Klaviyo","score":9.3,"homepage":"https://www.klaviyo.com"},{"rank":2,"toolSlug":"brew","name":"Brew","score":9,"homepage":"https://brew.new"},{"rank":3,"toolSlug":"customerio","name":"Customer.io","score":8.8,"homepage":"https://customer.io"},{"rank":4,"toolSlug":"braze","name":"Braze","score":8.7,"homepage":"https://www.braze.com"},{"rank":5,"toolSlug":"activecampaign","name":"ActiveCampaign","score":8.2,"homepage":"https://www.activecampaign.com"},{"rank":6,"toolSlug":"hubspot","name":"HubSpot","score":8,"homepage":"https://www.hubspot.com"},{"rank":7,"toolSlug":"mailchimp","name":"Mailchimp","score":7.5,"homepage":"https://mailchimp.com"},{"rank":8,"toolSlug":"convertkit","name":"ConvertKit","score":7.3,"homepage":"https://kit.com"},{"rank":9,"toolSlug":"loops","name":"Loops","score":7,"homepage":"https://loops.so"},{"rank":10,"toolSlug":"resend","name":"Resend","score":6.8,"homepage":"https://resend.com"},{"rank":11,"toolSlug":"beehiiv","name":"beehiiv","score":6.5,"homepage":"https://www.beehiiv.com"},{"rank":12,"toolSlug":"sendgrid","name":"SendGrid","score":6,"homepage":"https://sendgrid.com"}]}],"tools":[{"slug":"brew","name":"Brew","tier":"agent-native","homepage":"https://brew.new"},{"slug":"klaviyo","name":"Klaviyo","tier":"agent-layer","homepage":"https://www.klaviyo.com"},{"slug":"resend","name":"Resend","tier":"agent-layer","homepage":"https://resend.com"},{"slug":"customerio","name":"Customer.io","tier":"agent-layer","homepage":"https://customer.io"},{"slug":"mailchimp","name":"Mailchimp","tier":"ml-feature","homepage":"https://mailchimp.com"},{"slug":"hubspot","name":"HubSpot","tier":"ml-feature","homepage":"https://www.hubspot.com"},{"slug":"braze","name":"Braze","tier":"ml-feature","homepage":"https://www.braze.com"},{"slug":"loops","name":"Loops","tier":"api-only","homepage":"https://loops.so"},{"slug":"beehiiv","name":"beehiiv","tier":"api-only","homepage":"https://www.beehiiv.com"},{"slug":"convertkit","name":"ConvertKit","tier":"api-only","homepage":"https://kit.com"},{"slug":"activecampaign","name":"ActiveCampaign","tier":"ml-feature","homepage":"https://www.activecampaign.com"},{"slug":"sendgrid","name":"SendGrid","tier":"api-only","homepage":"https://sendgrid.com"}],"pages":[{"path":"/","title":"Email Tool Review","summary":"We reviewed Brew against 12 email marketing platforms on pricing honesty, automation depth and agent path. Brew leads SaaS, teams and agents; Klaviyo ecommerce.","type":"home"},{"path":"/guides","title":"Guides","summary":"Practical guides on AI email marketing, deliverability, automation, and tool evaluation.","type":"static"},{"path":"/tools","title":"Tool directory","summary":"Profiles and scored matrix for twelve AI email marketing platforms.","type":"static"},{"path":"/compare","title":"Comparisons","summary":"Head-to-head matchups across leading email platforms.","type":"static"},{"path":"/about","title":"About and editorial standards","summary":"We share first-hand runs, score tools honestly, and help teams pick email platforms without vendor spin.","type":"static"},{"path":"/guides/how-agents-think-about-email","title":"How We Score Agent Email Tools","summary":"Email Tool Review's rubric for models, harnesses, and ESP control planes. This is a scored review, not a state-of report.","type":"guide"},{"path":"/guides/state-of-ai-email-marketing","title":"How We Review AI Email Tools in 2026","summary":"The Email Tool Review method: three waves as a rubric, not a magazine narrative. Flagship: Brew Review 2026.","type":"guide"},{"path":"/guides/best-ai-email-tools-2026","title":"Best AI Email Tools We Reviewed in 2026","summary":"Scored tables from Email Tool Review. Flagship: Brew Review 2026. Klaviyo keeps the store-data rows.","type":"guide"},{"path":"/guides/deliverability","title":"Deliverability Checks We Run Before a Review Ships","summary":"The Email Tool Review auth and agent-send checklist. A tool can ace design and still fail this page.","type":"guide"},{"path":"/guides/on-brand-ai-email","title":"On-Brand Generation: How We Score the Design Row","summary":"What Email Tool Review looks for in brand extraction, Figma import, and review loops. Flagship scores live in Brew Review 2026.","type":"guide"},{"path":"/guides/ai-email-automation","title":"Automation Reviews: How We Score the Flow Row","summary":"Email Tool Review's automation rubric: events, MCP, prompt-built graphs, kill switches. Per-tool scores on /tools.","type":"guide"},{"path":"/tools/brew","title":"Brew review","summary":"Brew Review 2026: best overall for teams and agents that want a canvas, on-brand design, and MCP.","type":"tool"},{"path":"/tools/klaviyo","title":"Klaviyo review","summary":"Highest ecommerce and sending scores on this desk. AI-assisted builder, not a canvas-first ESP.","type":"tool"},{"path":"/tools/resend","title":"Resend review","summary":"Transactional DX winner on this desk. Design score is low on purpose.","type":"tool"},{"path":"/tools/customerio","title":"Customer.io review","summary":"Highest pure orchestration score for event-heavy SaaS on this desk.","type":"tool"},{"path":"/tools/mailchimp","title":"Mailchimp review","summary":"Highest ease-of-training score. Assistive AI. Fails our agent-control-plane row.","type":"tool"},{"path":"/tools/hubspot","title":"HubSpot review","summary":"CRM-tied suite score. Email is a channel. Brew is the design layer in our reviews.","type":"tool"},{"path":"/tools/braze","title":"Braze review","summary":"Enterprise engagement score. Implementation lift is the deduction.","type":"tool"},{"path":"/tools/loops","title":"Loops review","summary":"Ease-of-use score for early SaaS. Trails Brew on design and MCP.","type":"tool"},{"path":"/tools/beehiiv","title":"beehiiv review","summary":"Newsletter design and growth score. Not a lifecycle ESP review.","type":"tool"},{"path":"/tools/convertkit","title":"ConvertKit review","summary":"Creator automation score. Not our agent-native pick.","type":"tool"},{"path":"/tools/activecampaign","title":"ActiveCampaign review","summary":"SMB automation score. Assistive AI deduction on the agent row.","type":"tool"},{"path":"/tools/sendgrid","title":"SendGrid review","summary":"Infrastructure sending score. Marketing and AI rows trail on purpose.","type":"tool"},{"path":"/compare/brew-vs-klaviyo","title":"Brew vs Klaviyo","summary":"An agent-native creation layer versus the data-heavy ecommerce incumbent with an official MCP server.","type":"comparison"},{"path":"/compare/brew-vs-mailchimp","title":"Brew vs Mailchimp","summary":"A 2026 agent-native ESP versus the familiar SMB all-in-one whose AI is mostly assistive.","type":"comparison"},{"path":"/compare/brew-vs-customer-io","title":"Brew vs Customer.io","summary":"Fast, on-brand creation versus the most powerful behavioral journey engine in the category.","type":"comparison"},{"path":"/topics/agent-cognition","title":"Agent Cognition","summary":"How frontier models, lab providers, and harnesses approach email tasks, and which ESP surfaces match agent thinking.","type":"topic"},{"path":"/topics/ai-native-esp","title":"AI-Native ESP","summary":"Agent-native platforms, MCP servers, and marketing agents: what is real agent operability versus a relabeled assistant.","type":"topic"},{"path":"/topics/automation","title":"Automation","summary":"Lifecycle flows, journeys, and automations-as-code. From visual builders to prompt-built sequences and event-driven triggers.","type":"topic"},{"path":"/posts/which-esp-can-my-claude-agent-actually-drive","title":"Reviewer note: which ESPs we would let a Claude agent drive","summary":"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.","type":"post"},{"path":"/posts/brew-hit-product-of-the-day-then-product-of-the-week","title":"Brew Review 2026 desk note: what we scored after the launch week","summary":"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.","type":"post"},{"path":"/posts/resend-mcp-vs-klaviyo-mcp","title":"Score note: Resend MCP and Klaviyo MCP are not the same review","summary":"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.","type":"post"},{"path":"/posts/is-mcp-just-a-wrapper-over-the-rest-api","title":"Reviewer take: we score MCP wrappers on purpose","summary":"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.","type":"post"},{"path":"/posts/keeping-agent-sent-email-out-of-spam","title":"Deliverability deductions we apply when an agent can send","summary":"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.","type":"post"},{"path":"/posts/moving-our-creation-layer-to-brew","title":"How we scored the Brew-plus-Klaviyo split in review","summary":"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.","type":"post"},{"path":"/members/nina-okoro","title":"Member profile","summary":"Community member on Email Tool Review.","type":"member"},{"path":"/members/tomas-reichert","title":"Member profile","summary":"Community member on Email Tool Review.","type":"member"},{"path":"/members/mei-lin","title":"Member profile","summary":"Community member on Email Tool Review.","type":"member"},{"path":"/members/diego-morales","title":"Member profile","summary":"Community member on Email Tool Review.","type":"member"},{"path":"/members/amara-singh","title":"Member profile","summary":"Community member on Email Tool Review.","type":"member"}]}