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

Lumail is a Sender alternative that stores unlimited subscribers and bills by emails sent, with 89 MCP tools, a ChatGPT OAuth plugin, CLI, and SDK. Sender is a subscriber-tier email, SMS, and landing-page platform: Free Forever covers 2,500 subscribers and 15,000 emails/month; paid Standard starts at $10/month monthly ($7/month billed annually) for 1,000 subscribers and 12,000 emails.

Sender positions itself as email marketing that sells without the hassle: create, automate, and send emails without complicated setup or high costs. Official pages sell a Free Forever plan, campaigns, visual automation, transactional email via API or SMTP, SMS, landing pages, forms, and ecommerce integrations (WordPress, Shopify, WooCommerce, PrestaShop, Zapier). Marketing copy claims 180,000+ businesses, 24/7 live chat, and a free migration service.

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.

ChatGPT plugin

Lumail vs Sender at a glance

Decision	Lumail	Sender
Core focus	Newsletters, workflows, transactional email, and AI-agent operations	Email marketing platform with SMS, landing pages, and transactional sending
AI and developer access	89 organization-scoped MCP tools, CLI, TypeScript SDK, REST API, AI editor	Remote MCP at https://mcp.sender.net/mcp (OAuth, documented for Claude, ChatGPT developer mode, and Cursor). REST API v2. No official CLI or first-party TypeScript SDK documented. No in-editor AI copy generator documented on official product pages.
Pricing basis	Email volume, with unlimited subscribers on every plan	Active subscriber tier. Standard monthly email cap = subscribers × 12; Professional = subscribers × 24. Enterprise: unlimited emails, custom price, annual only. Optional pay-as-you-go credit packs with unlimited subscribers.
Free plan	3,000 emails per month, no credit card	Free Forever: $0, no credit card, 2,500 active subscribers, 15,000 emails/month, 1 seat, Sender branding on emails and forms. Includes newsletters, visual automation, landing pages, signup forms and popups, and transactional email. No SMS.
Paid entry	Premium $20/month with 40,000 emails included	$10/month
Automation	Graph-based workflows on every plan	Visual workflows on every plan including Free (help center: no fixed step cap; premade templates on all plans). Triggers include group join/leave, date, anniversary, link click, abandoned cart, purchase, order fulfilled, unsubscribe, field update, and API/custom events. Steps: email, SMS, delay, condition, action, split. Advanced/multichannel workflow features and workflow SMS-activity conditions are Professional.
Transactional email	Included in the same organization through API or SMTP	Same account on every plan including Free, via REST API (POST https://api.sender.net/v2/message/send) or SMTP (smtp.sender.net, ports 587/2525/25). Shares the plan’s monthly email credits with marketing sends.
Publishing	Capture pages for subscriber acquisition	Drag-and-drop and HTML email builders, templates, signup forms, popups, and landing pages. Standard adds unlimited landing pages, custom domain, and no Sender branding. Not a general website builder.
Best fit	Teams operating email through agents, code, and a visual app	Small businesses and ecommerce stores that want inexpensive email plus SMS, landing pages, and automations, and can live with subscriber-tier billing.

Sender's current plans come from its Sender 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.

Official remote MCP: POST https://mcp.sender.net/mcp, OAuth 2 with scope mcp:use, RFC 9728 discovery. Help center (updated 2026-08-11) documents Claude (custom connector), ChatGPT (developer mode / custom MCP, not a first-party ChatGPT OAuth plugin), and Cursor. Tools follow the logged-in user’s RBAC and plan features. Documented catalog is about 40 named tools: account/domains/stores/events, subscribers/groups, segments, email campaigns (create is draft-only; no send tool), workflows (create draft, validate, activate/deactivate), and image uploads. Campaigns created over MCP never send; workflow go-live is a separate activate_workflow call with the same pre-flight as the dashboard. create_workflow is rate-limited to 50/account/day. Drag-and-drop designs are read-only unless overwrite is explicit. REST API base https://api.sender.net/v2/ covers subscribers, groups, segments, fields, statistics, campaigns, transactional campaigns, workflows, and account webhooks. Code samples in the API docs; no official CLI or first-party TypeScript SDK documented. Live plans feed sets api_request_limit to 300 (Standard) and 600 (Professional); transactional help says the per-minute cap is returned in X-RateLimit-Limit.

Choose Lumail when:

• You want unlimited subscriber storage billed by emails sent, not by list size
• You want 89 org-scoped MCP tools plus a ChatGPT OAuth plugin, CLI, and TypeScript SDK rather than a ~40-tool MCP plus REST only
• You send a large list infrequently: Sender’s paid price follows subscriber count even when you stay under the email cap

Choose Sender if that product's model is the job

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

Choose Sender when:

• You need SMS, popups, and landing pages in the same dashboard as email
• You want a $0 plan with 2,500 contacts, 15,000 emails, automations, and transactional sending
• You run Shopify/WooCommerce/PrestaShop and want native cart/purchase workflows and ecommerce reports

Lumail does not try to be Sender. 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

USD, VAT excluded. Live plan table from https://cdn.sender.net/plans/context.json on 2026-08-17. Free Forever (pricing page + help): 2,500 active subscribers, 15,000 emails/month, 1 seat, Sender branding; exceeding the subscriber cap blocks campaign sends even if the audience is smaller. Standard and Professional prices follow the subscriber slider. Standard email cap = 12× subscribers; Professional = 24×. Seats: Standard 3, Professional 10, Enterprise unlimited. Standard monthly USD (subscribers → emails → $/month): 1,000/12k/$10; 2,500/30k/$19; 5,000/60k/$33; 10,000/120k/$57; 25,000/300k/$117; 50,000/600k/$227; 100,000/1.2M/$367. Professional monthly: 1,000/24k/$20; 2,500/60k/$35; 5,000/120k/$60; 10,000/240k/$120; 20,000/480k/$250; 50,000/1.2M/$460. Annual billing in the live feed is 30% off the monthly×12 first term (Standard 1k = $7/month equivalent / $84 year; Professional 1k = $14/month equivalent / $168 year); a 20% renewal offer is also in that feed. Dedicated Standard/Professional marketing pages still say “Starting at only $7” and “$14”, which match those annual equivalents, not month-to-month. Pay as you go (unlimited subscribers, no branding, no SMS/advanced automation/dedicated IP): 5,000 emails $29; 10k $57; 20k $97; 50k $167; 100k $277; 250k $547; 500k $947; 1M $1,697; 5M $4,995. One credit = one email; credits do not expire. SMS is prepaid by destination country (calculator on the pricing page; Professional includes free SMS credits equal to the monthly subscription fee). Dedicated IPs: Professional, 20,000-subscriber plans and above, on request, no extra cost. Enterprise is custom and annual-only. Worked examples: at 20,000 emails, Lumail Premium is $20 with unlimited subscribers; Sender Professional 1,000 is $20/month for 24,000 emails but only 1,000 subscribers, and Standard 2,500 is $19/month for 30,000 emails. At 50,000 subscribers Sender Standard is $227/month ($158.90/month billed annually) for 600,000 emails even if you send far less. At 400,000 emails the cheapest live Standard SKU with ≥400k credits is 35,000 subscribers at $167/month (420,000 emails); Lumail Business is $200/month for 400,000 emails with unlimited subscribers. Confirm the slider on the pricing page before buying.

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

Automations live at Automations in the dashboard. Free Forever includes limitless workflows and premade templates; help says premium automation extras are Professional. Visual builder steps: Condition, Delay (minutes to months, or a date), Email (drag-and-drop, plain text, or HTML), SMS, Action, Split. Triggers documented in help: subscriber added to / removed from a group, date, anniversary of a date, link clicked, cart abandoned, product purchased, order fulfilled (Shopify), API call, subscriber unsubscribed, subscriber field updated. Conditions include subscriber details/status, workflow email activity, campaign activity, group/segment membership, cart/purchase/order fields, and (Professional) workflow SMS activity. Actions: move/copy/remove from group, unsubscribe, update/remove custom fields, notify me, send webhook. Ecommerce revenue reports and inbox-provider reports are Professional. SMS in campaigns/workflows is not on Free; Standard can buy SMS credits; Professional includes a monthly SMS credit allowance.

Transactional sending is on Free, Standard, Professional, and Enterprise and shares the monthly email credit pool with campaigns and automations (Free FAQ: up to 15,000 combined). REST: POST https://api.sender.net/v2/message/send with Bearer token; SMTP: smtp.sender.net, recommended port 587 TLS (also 2525 and 25), PLAIN or LOGIN. From address must be a verified domain. Features pages: SPF/DKIM/DMARC, webhooks, Liquid templates, attachments up to 10MB, logs searchable for 30 days. Rate limits are per-minute per API token (headers X-RateLimit-Limit / Remaining / Reset; 429 + Retry-After). Dedicated IP is not on Free/Standard. Professional marketing copy also sells “full transactional email & SMTP support”; treat the Free-plan FAQ and features page as the inclusion source, and Professional as adding dedicated IP / priority routing rather than unlocking transactional sending.

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 Sender alternative?

Yes if you need campaigns, automations, and transactional email. Sender is a subscriber-tier SMB suite with SMS, landing pages, and a 2,500-contact free plan. Lumail is an email platform: unlimited subscribers, volume pricing, capture pages, graph workflows on every plan, and agent access via MCP, ChatGPT OAuth, CLI, SDK, and REST. Lumail has no SMS and no general website builder. Check both pricing pages before switching.

Is Lumail cheaper than Sender?

It depends on list size versus send volume. Sender Free is $0 for 2,500 subscribers and 15,000 emails. Paid Standard is $10/month monthly ($7/month billed annually) at 1,000 subscribers for 12,000 emails, then $19 at 2,500 and $227 at 50,000 subscribers. Lumail Free is 3,000 emails with unlimited subscribers; Premium is $20 for 40,000 emails then $0.60 per 1,000. A large list you email lightly is usually cheaper on Lumail; a tiny list that wants SMS and landing pages is usually cheaper on Sender.

What is the main difference between Lumail and Sender?

Billing and operating surface. Sender prices by active subscribers, caps monthly emails at 12× or 24× that tier, and bundles SMS, forms, and landing pages. Lumail prices by emails sent, stores unlimited subscribers, and treats the visual app, MCP, ChatGPT, CLI, SDK, and API as one org-scoped product. Both include visual automations and transactional API/SMTP; Sender’s MCP is smaller and draft-first, and ChatGPT uses developer-mode custom MCP rather than a first-party OAuth plugin.

Can I migrate from Sender to Lumail?

Yes for a typical email program. Export subscribers (CSV/Excel) and suppression lists from Sender, import into Lumail, then rebuild segments, templates, and graph workflows. There is no official one-click Sender-to-Lumail importer. Transactional sending can move to Lumail’s API or smtp.lumail.io:587 STARTTLS in the same org. SMS, popups, and Sender landing pages have no Lumail equivalent; keep those elsewhere or drop them. Re-point SPF, DKIM, and DMARC before cutting over production sends.

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.