A platform built on store data against a CRM shared by marketing, sales and service.
Choose Klaviyo if you run an online store and want SMS, push and flows built on your store data.
Choose HubSpot if marketing, sales and service need to share one CRM, and you want landing pages and ads in the same account.
Choose Brew if you want a fully agentic setup, where your AI agent drives lifecycle marketing to engage and retain customers. Brew designs every email from your brand and runs your automations agentically.
THE BROWSERCOMPANY
Brew is the third column, for teams that want an agent to design and send their email.
| Klaviyo | HubSpot |  Brew | |
|---|---|---|---|
| Key differences | |||
| Billed on | Klaviyo: Active profiles: contacts who can receive marketing | HubSpot: Marketing contacts and seats | Brew: Emails sent and AI credits |
| Fully agentic | Klaviyo: Partly. Partly: Composer drafts campaigns and flows; you review and launch | HubSpot: Partly. Partly: AI drafts emails and workflows; your team turns them on | Brew: Yes. Your agent designs, sends and runs automations end to end |
| Your agent takes it live | Klaviyo: Yes. MCP tools create and send campaigns and create flows | HubSpot: No. MCP and Claude connector draft; you send in HubSpot | Brew: Yes. Sends, schedules and runs automations; OAuth and org-scoped MCP require confirmation, brand API keys do not |
| Designs finished, on-brand emails | Klaviyo: Partly. Partly: Fills sections into a template; you finish the design | HubSpot: No. Drafts copy into a template you pick, Professional and up | Brew: Yes. Layout, copy and images from your brand, ready to send |
| SMS and messaging | Klaviyo: Yes. SMS, WhatsApp and RCS, billed per message | HubSpot: Yes. SMS add-on from $75/month, US only, Professional and up | Brew: No. Email only |
| Klaviyo | HubSpot | Brew | |
|---|---|---|---|
| Creating emails | |||
| Remembers your brand for every email | Klaviyo: Partly. Partly: Brand library of logos, colors, fonts and voice | HubSpot: Partly. Partly: Brand identity for AI content, in beta | Brew: Yes. Brand files your agent reads every time |
| Visual editor | Klaviyo: Yes. Drag-and-drop editor and templates | HubSpot: Yes. Drag-and-drop editor and templates | Brew: Yes. Infinite canvas, edit by hand or in chat |
| Bring the emails you already have | Klaviyo: Yes. HTML templates, or a screenshot for Composer | HubSpot: Partly. Partly: AI turns outside designs into templates, Professional and up | Brew: Yes. HTML, MJML, React Email, Figma or a forwarded email |
| Automation | |||
| Event-triggered automations | Klaviyo: Yes. Store activity from over 350 integrations | HubSpot: Partly. Partly: CRM changes and forms; behavioral events on Enterprise | Brew: Yes. Stripe, Shopify, Clerk, Supabase or your own events |
| Builds an automation from a description | Klaviyo: Yes. Composer drafts flows and their messages | HubSpot: Partly. Partly: Breeze drafts the actions; stays off until you turn it on | Brew: Yes. Emails, waits and branches together |
| Product recommendations | Klaviyo: Yes. Personalized product recommendations | HubSpot: Yes. In emails, Professional and up | Brew: No. Not built in |
| Channels | |||
| Email from your own domain | Klaviyo: Yes. Campaigns and flows | HubSpot: Partly. Partly: Marketing; transactional is a $600/month add-on | Brew: Yes. Marketing and transactional |
| Signup forms and pages | Klaviyo: Yes. Web forms | HubSpot: Yes. Landing pages, forms and ads in Marketing Hub | Brew: No. No forms builder |
| Agents and developers | |||
| MCP server for AI agents | Klaviyo: Yes. Over 260 tools, in Claude, ChatGPT, Cursor and VS Code | HubSpot: Partly. Partly: Reads CRM data and creates email drafts | Brew: Yes. Every Brew tool, in Claude, ChatGPT, Cursor and Grok |
| API | Klaviyo: Yes. Klaviyo APIs | HubSpot: Yes. REST APIs for CRM and marketing email | Brew: Yes. REST API, typed SDK and CLI |
| Pricing | |||
| Getting started | Klaviyo: Free: 250 active profiles, 500 sends a month | HubSpot: Free tools: 2,000 sends a month with HubSpot branding | Brew: Free trial with 500 AI credits and 1,000 sends |
| First paid plan | Klaviyo: $20/month for 500 profiles and 5,000 sends | HubSpot: Starter, from $20/month per seat: 1,000 marketing contacts | Brew: Growth, $99/month: 10,000 AI credits and 50,000 sends |
| Next plan | Klaviyo: $100/month at 5,000 profiles: 50,000 sends | HubSpot: Professional, from $890/month: 3 seats, 2,000 marketing contacts | Brew: Pro, $249/month: 25,000 AI credits and 200,000 sends |
| Top plan | Klaviyo: Through sales; price not listed | HubSpot: Enterprise, from $3,600/month billed annually, 10,000 contacts | Brew: Custom volume and a dedicated account manager |
| Security and compliance | |||
| SOC 2 | Klaviyo: Yes. SOC 2 and ISO 27001 certified | HubSpot: Yes. SOC 2 Type II and SOC 3 reports | Brew: No. Not yet; security review and DPA on request |
Neither designs a finished, on-brand email. Klaviyo’s Email AI drafts sections from a template for you to finalize; HubSpot’s AI drafts emails into a template you pick, on Professional and up.
Teams that move to Brew tell us AI drafts from tools like these rarely look like their brand, so someone still redesigns them.
Both price on the size of your list: Klaviyo on active profiles, HubSpot on marketing contacts and seats.
Both start at $20/month. Klaviyo’s first paid tier covers 500 active profiles and 5,000 sends; HubSpot Starter is $20/month per seat with 1,000 marketing contacts. On the free plans, Klaviyo allows 250 active profiles and 500 sends a month, and HubSpot’s free tools 2,000 sends a month with HubSpot branding.
The gap opens after that. Klaviyo is $100/month at 5,000 profiles with 50,000 sends, and Composer costs $20/month beyond a small free allowance. HubSpot Professional, where its AI email drafting and workflows start, is from $890/month with 3 seats and 2,000 marketing contacts, plus a $3,000 onboarding fee.
Brew bills on emails sent and AI credits, with unlimited contacts: Growth is $99/month for 50,000 sends and 10,000 AI credits.
Brew is fully agentic: your agent designs on-brand emails, sends them and runs your automations. Unlimited contacts on every plan. OAuth and organization-scoped MCP connections ask you to confirm live sends and launches. Brand-scoped API keys can execute permitted calls without the MCP confirmation step.
Connect Claude, ChatGPT, Cursor or Grok over MCP and your agent gets every Brew tool. It designs emails from your brand, builds audiences, runs automations and schedules sends. OAuth and organization-scoped MCP connections ask you to confirm live sends and launches. Brand-scoped API keys can execute permitted calls without the MCP confirmation step.
Paste your website and Brew writes your brand into two files your agent reads for every email. Describe the email and it appears on the canvas, ready to edit by hand or in chat.
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Can't find what you're looking for? Contact us at +1-(332)-203-2145 or support@brew.new.
Klaviyo, for most online stores: its flows run on store activity from over 350 integrations, and it adds SMS, WhatsApp, push and product recommendations. HubSpot fits when sales and service share the CRM with marketing; it adds product recommendations in emails on Professional and up.
Both start at $20/month: Klaviyo for 500 active profiles and 5,000 sends, HubSpot Starter per seat with 1,000 marketing contacts and up to 10 actions per automation. Past that, Klaviyo usually costs less: $100/month at 5,000 profiles, against $890/month for HubSpot Professional with 2,000 marketing contacts, plus a $3,000 onboarding fee.
Klaviyo goes further: Composer drafts campaigns, flows and segments, and its MCP tools can create and send campaigns. HubSpot’s AI drafts emails into a template you pick, and Breeze drafts workflows that stay off until you turn them on, both on Professional and up; its MCP server and Claude connector create drafts that you send in HubSpot. Neither designs a finished, on-brand email; Brew does.
Brew, if you want an agent to run your email. Your agent designs finished, on-brand emails from your brand, sends them and runs your automations, with unlimited contacts on every plan and no onboarding fee. Brew is email only and has no sales CRM, so SMS, push, landing pages and your CRM stay in another tool.
Yes. Connect either in Brew and save any email as a template in Klaviyo or HubSpot Marketing Hub, ready for your campaigns, flows and workflows. After changing a HubSpot design, export a new template and select it in HubSpot. Many teams keep HubSpot as their CRM and run email in Brew.
Brew publishes this comparison. Brew Team reviewed the linked first-party documentation. This is a documentation review, not a claim of hands-on testing of every product. Pricing and plan limits can change.
Work at Klaviyo or HubSpot? If anything on this page is wrong or out of date, email support@brew.new and we will correct it. We want to compete on the product, not on a mistaken comparison.
Updated October 2026
