Lumail vs MailerSend: Which Email Platform Fits How You Work?

Lumail is a MailerSend alternative when you need newsletters, graph workflows, subscribers, and transactional email in one agent-operable organization. MailerSend is MailerLite's transactional sending API and SMTP relay; its own help tells you to send newsletters on MailerLite. Buy MailerSend for app-triggered mail; buy Lumail to operate the channel.

MailerSend positions itself as an intuitive email API and SMTP service for transactional messages: invoices, delivery updates, password resets, and similar app-triggered mail, with high deliverability, a drag-and-drop template builder so non-developers can contribute, and a REST API plus seven SDKs. Developer docs: 'a powerful transactional email system built for developers but designed so non-tech teams can contribute without coding.' It is the transactional sister of MailerLite.

This comparison uses public product information checked on 2026-08-17. Check each pricing page before purchasing because plans, limits, and catalogs change. For a condensed version, see the side-by-side comparison table.

Campaign editor

Lumail vs MailerSend at a glance

Decision	Lumail	MailerSend
Core focus	Newsletters, workflows, transactional email, and AI-agent operations	Transactional email API and SMTP platform (MailerLite sister product)
AI and developer access	89 organization-scoped MCP tools, CLI, TypeScript SDK, REST API, AI editor	Hosted remote MCP at https://mcp.mailersend.com/mcp (OAuth). Official catalog on developers.mailersend.com/mcp names 127 tools covering send/bulk, domains, SMTP users, messages, templates, webhooks, inbound, recipients, suppressions, activity, analytics, verification, DMARC, blocklist monitors, tokens, users/invites, sender identities, SMS, plus search/fetch. CLI (mailersend/mailersend-cli). 7 official SDKs + OpenAPI. No ChatGPT OAuth plugin documented (ChatGPT uses Developer Mode connector). MCP docs are labeled beta on mcp-server.html.
Pricing basis	Email volume, with unlimited subscribers on every plan	Monthly email volume, not subscribers. Hobby is $7/month for 5,000 emails then $1.50 per 1,000 extra. Starter and Professional are volume SKUs (50k–2M slider) with extras per 1,000. Yearly is advertised as 10% off. Unused quota resets every 30 days; paid plans keep sending on overage unless you set a billing limit.
Free plan	3,000 emails per month, no credit card	Free plan: 500 emails/month after account approval; credit card required, not charged. Limits from the pricing FAQ and help: 1 domain, 1 template, 1 user + 1 accountant, 1 API token, 1 webhook, 100 daily API/SMTP requests, 1-day activity retention. Extra emails are not allowed — sending pauses until the 30-day window resets. Separate Trial: 100 emails/month to 2 recipients plus a trial domain.
Paid entry	Premium $20/month with 40,000 emails included	$7/month
Automation	Graph-based workflows on every plan	No visual journey/drip canvas. Sends are API, SMTP, bulk endpoint, or scheduled messages (CLI documents send-at max now+72h). MCP copy describes prompt-built transactional flows (welcome, password reset, order confirmation). Zapier, Make, WordPress, WooCommerce, Firebase, Supabase. Split testing and in-template surveys exist. Marketing automations are MailerLite.
Transactional email	Included in the same organization through API or SMTP	Core product. REST API https://api.mailersend.com/v1/ and SMTP smtp.mailersend.net port 587 with STARTTLS (TLS 1.2/1.3). Official help: do not use the SMTP relay for regular marketing mail. Inbound routing parses replies into the app. Transactional SMS API on Starter/Professional/Enterprise, USA and Canada only.
Publishing	Capture pages for subscriber acquisition	Drag-and-drop, custom HTML, and rich-text template builders for transactional templates. Bulk endpoint for personalized one-to-one batches, not a hosted newsletter publication. Official help: for newsletters, promotions, and marketing campaigns, use MailerLite.
Best fit	Teams operating email through agents, code, and a visual app	Developers and mixed tech/non-tech teams sending transactional email (receipts, password resets, notifications) via API or SMTP, including agencies that need many domains or sender identities.

MailerSend's current plans come from its MailerSend pricing. Lumail's plans are on the Lumail pricing page.

Choose Lumail if agents should operate your email

Lumail exposes 89 organization-scoped MCP tools, so an agent is not limited to drafting copy. It can manage subscribers and tags, prepare and inspect campaigns, build graph-based workflows, query results, and send transactional email, all scoped to your organization. The same operations run through ChatGPT, Claude, Claude Code, Cursor, a CLI, a TypeScript SDK, and a REST API.

Hosted MCP: https://mcp.mailersend.com/mcp (streamable HTTP, OAuth). Product page mailersend.com/features/mcp; catalog developers.mailersend.com/mcp names 127 tools (send_email, send_bulk_email, get_bulk_email_status; 8 domain tools; 5 SMTP-user; 5 message/schedule; 5 template; 5 webhook; 5 inbound; 3 recipient; 14 suppression; 2 activity; 4 analytics; 8 verification; 9 DMARC; 5 blocklist-monitor; 5 token; 9 user/invite; 9 sender-identity; send_sms plus 20 other SMS tools; search; fetch). Help article documents Claude, VS Code/Copilot, Cursor (warns Cursor Free caps 40 tools per connector), ChatGPT Pro/Plus Developer Mode, Gemini CLI. Complementary: MailerSend CLI (brew cask mailersend/tap/mailersend; OAuth or API token). REST https://api.mailersend.com/v1/. Official libraries: PHP, Laravel, Node.js, Go, Python, Ruby, Java, OpenAPI. MCP feature copy is transactional (send, domains, templates, webhooks, suppressions, SMS, users). The older mcp-server.html intro still says 'email marketing API' / subscribers / campaigns / groups — that is not the tool list; treat it as stale/MailerLite-flavored copy. No ChatGPT OAuth app. Plan gating for MCP is not stated as paid-only.

Choose Lumail when:

• You want campaigns, graph workflows, capture pages, unlimited stored subscribers, and transactional API/SMTP in one org agents can operate (89 organization-scoped MCP tools plus ChatGPT OAuth plugin, CLI, SDK)
• You send newsletters or lifecycle sequences and do not want a MailerSend + MailerLite split
• You want a 3,000-email free tier with no credit card and overages at $0.60/$0.40 per 1,000 rather than MailerSend's 500-email free cap (card required) and $1.50/$1.30-starting extras

Choose MailerSend if that product's model is the job

MailerSend is built for a different operator. That is not a slight; it is the comparison.

Choose MailerSend when:

• Transactional delivery from application code is the whole product, and you want MailerSend's API, smtp.mailersend.net:587, inbound routing, and template builders
• You already run marketing on MailerLite and want the sibling transactional stack
• You need US/Canada transactional SMS, agency sender identities / many domains, or Professional deliverability extras (DMARC monitors, dedicated IP via support)

Lumail does not try to be MailerSend. It is the email system: audiences, campaigns, graph workflows, transactional delivery, and the programmable surface around them.

Compare the pricing model, not the sticker price

Live pricing page JS (mailersend.com/pricing, USD, 2026-08-17) plus help/plans-features-and-limits. Hobby $7/month for 5,000 emails, extra $1.50 per 1,000. Starter/Professional volume SKUs from the page's price[] array: 50,000 emails Starter $35 / Professional $110, extra $1.30/1k both; 100,000 Starter $68 / Pro $140, extra $1.30/1k (matches the pricing FAQ worked example); 250,000 Starter $162.50 extra $1.10 / Pro $275 extra $1.00; 500,000 Starter $325 extra $1.10 / Pro $525 extra $0.80; 1,000,000 Starter $600 extra $1.00 / Pro $1,000 extra $0.60; 1.5M Pro only $1,350 extra $0.60; 2M Pro only $1,600 extra $0.50. Yearly toggle is labeled Save 10%; page JS multiplies monthly by 0.9 (help: Hobby $6.30, Starter $31.50, Pro $99 at the 50k floor). Invoices are USD. Free requires a card to prevent abuse; Trial is 100 emails/month to 2 recipients. Paid overage bills next month; Free/Trial pause. Nonprofit 30% off paid plans, not stackable with yearly. Add-ons listed: domain space $4/domain; phone number $2; activity retention from $5; DMARC monitor $2/domain; email verification credits (unit price is a slider, not a static number in the HTML); dedicated IPs contact support, Enterprise sending over 100k emails/week. SMS extras in the same JS: $1.40 per 100 SMS at the 50k Starter/Pro floor. Worked examples using those published rates vs Lumail: 20,000 emails = Lumail Premium $20 vs MailerSend Hobby $7 + 15×$1.50 = $29.50 or Starter $35; 50,000 = Lumail Premium $20 + 30×$0.60 = $38 vs Starter $35; 100,000 = Lumail Premium $20 + 80×$0.60 = $68 vs Starter $68 / Pro $140. Check the live slider before buying — unhydrated HTML still shows stale $5.60 Hobby yearly and $0.90 extra placeholders.

Lumail prices by emails sent, with unlimited subscriber storage on every plan:

• Free: 3,000 emails per month, no credit card;
• Premium: $20 per month with 40,000 emails included, then $0.60 per 1,000;
• Business: $200 per month with 400,000 emails included, then $0.40 per 1,000.

List growth alone never raises the Lumail bill. Only sending does. Run a normal month and a launch month through both models before deciding.

Compare automation and transactional email

Not a newsletter automation product. No graph/visual workflow builder. Documented primitives: API/SMTP send, bulk endpoint (Hobby/Starter/Professional: 500 email objects per request, each up to 50 To / 10 CC / 10 BCC = 35,000 emails; otherwise 5 objects), scheduled send, webhooks, inbound routes, template personalization, split testing, surveys. MCP 'common workflows' are prompt sequences (verify address → send welcome → track delivery), not a stored journey canvas. Integrations listed: Zapier, Make, Slack, Airtable, WordPress, WooCommerce, Firebase, Supabase, Laravel, Symfony. For lists, broadcasts, and marketing automations MailerSend's own help sends you to MailerLite.

Transactional sending is the product. API POST https://api.mailersend.com/v1/email with Bearer token; FROM must match a verified domain. SMTP host smtp.mailersend.net, port 587, STARTTLS, TLS 1.2/1.3; credentials are generated per SMTP user (not used as From). Concurrent SMTP connections: 5 on Trial/Free/Hobby/Starter, 50 on Professional/Enterprise. SMTP users per domain: 1 Trial/Free/Hobby, 5 Starter, 20 Professional/Enterprise (account caps 1 / 50 / 1,000). Daily API+SMTP quota resets midnight UTC: Trial/Free 100, Hobby 1,000, Starter 100,000, Professional/Enterprise 500,000; SMTP also 120 requests/minute. Inbound routing on the platform. Help: SMTP relay is not recommended for regular marketing emails. SMS: Starter+ , USA/Canada, phone-number add-on $2. Attachments via API up to 25MB.

Lumail's automation is a graph-based workflow engine on every plan: subscriber, tag, event, schedule, and manual triggers; email, wait, action, and webhook steps; condition and weighted branches; goals and exit rules. Transactional messages go through the REST API or smtp.lumail.io:587 with STARTTLS, inside the same organization as campaigns.

Questions people ask ChatGPT

Is Lumail a MailerSend alternative?

Yes if you want campaigns, graph workflows, capture pages, subscribers, and transactional email in one organization agents can operate. No if the product you are buying is a transactional sending API. MailerSend is MailerLite's API/SMTP service for app-triggered mail, with templates, inbound routing, optional SMS, a hosted MCP, and a CLI. Its help says newsletters belong on MailerLite. Lumail is the operating surface; MailerSend is the transactional pipe.

Is Lumail cheaper than MailerSend?

It depends on volume. MailerSend Hobby is $7/month for 5,000 emails then $1.50 per 1,000; Starter starts at $35/month for 50,000 then $1.30 per 1,000 (live slider). Lumail Premium is $20/month for 40,000 then $0.60 per 1,000. Official-rate examples: 20,000 emails = Lumail $20 vs MailerSend Hobby $29.50 or Starter $35; 50,000 = Lumail $26 vs Starter $35; 100,000 = Lumail Premium $56 vs MailerSend Starter $68. Lumail's free plan is 3,000 emails with no card; MailerSend's is 500 with a card and no overage. Model a real month on both pricing pages.

What is the main difference between Lumail and MailerSend?

MailerSend is transactional infrastructure: send from code via API or smtp.mailersend.net:587, design templates in their builders, and keep marketing on MailerLite. Lumail is an email operating system: visual campaigns, graph workflows on every plan, capture pages, unlimited subscribers, and transactional API/SMTP in the same org, with 89 organization-scoped MCP tools plus a ChatGPT OAuth plugin. MailerSend's hosted MCP is large (127 named tools) but scoped to sending, domains, templates, suppressions, and SMS — not newsletter campaigns or graph workflows.

Can I migrate from MailerSend to Lumail?

Yes for transactional and any bulk/lifecycle mail you have been sending through MailerSend. Export recipients and suppressions, authenticate the domain in Lumail, then point app sends at Lumail's API or smtp.lumail.io:587 STARTTLS. Rebuild sequences as graph workflows; MailerSend has no visual journey to import. If marketing already lives in MailerLite, migrate that list separately — MailerSend is not the list host. Some teams keep MailerSend for app mail and move the newsletter to Lumail.

Try the workflow that matters most

Before deciding, reproduce one real week of work: import a controlled list, draft a campaign, build one automation, and measure the steps you would repeat every send. Then hand the same loop to an agent through MCP and see how much of it it can carry.

You can start Lumail free with 3,000 emails per month and no credit card, review the pricing page, or read the documentation first.

Still evaluating? Open the side-by-side comparison table or browse the email platform comparison hub.