Lumail vs Substack
Lumail
Substack
Hosted paid publication
Lumail and Substack pricing and feature comparison
Free allowance
Lumail
$0
Substack
$0
$0 · 3,000 emails · Unlimited subscribers
$0 · Unlimited subscribers
Paid entry
$20/month, 40,000 included, then $0.60/1,000
10% of paid-subscription revenue, plus Stripe fees
Pricing basis
Unlimited subscribers; pricing follows email volume
Revenue share when paid subscriptions are enabled
Automation
Graph workflows with triggers, branches, goals, exits, and A/B paths
Publication and subscriber features rather than graph workflows
AI and developer access
ChatGPT OAuth, MCP, skills, CLI, SDK, REST API, and visual editor
No equivalent organization-wide MCP, CLI, SDK, and REST surface
Transactional email
Included through API, SMTP, SDK, CLI, and agent tools
Not a transactional email API
Publishing surface
Capture pages and custom web domains; not a general website builder
Hosted publication, app, community, and paid subscriptions
Choose Lumail if…
- You want to avoid a 10% platform share on paid revenue
- You need advanced segmentation and graph-based automations
- You need transactional email, APIs, or agent operations
Choose Substack if…
- You want a hosted publication with minimal setup
- Substack's reader network is part of your growth strategy
- You prefer revenue share over a recurring software subscription
Where Substack is strong
A real alternative, not a straw man.
Substack provides free hosted publishing, email delivery, reader discovery, community features, and a built-in paid-subscription model. People pick Substack when they need writers who want the shortest path to a hosted paid publication.
- No monthly platform fee for free publications
- Built-in paid subscriptions and reader network
- Very low setup and publishing friction
Don't trust the table. Run one journey.
Checklists lie by flattening the work. Build one real path: a trigger, a wait, a branch, a goal, an exit. Then open one subscriber and see what actually happened. That tells you more than any feature row.
- 1. Import a small, consented sample. Not the whole list.
- 2. Recreate one campaign and the audience it actually hits.
- 3. Publish one automation with a goal you can measure.
- 4. Fire a test and read every event on one person.
- 5. Compare the weekly work, not the setup afternoon.
Try it on a real send
Keep the whole list. Pay when you send.
3,000 emails free, no card. Rebuild one campaign, one workflow, and one transactional message before you move anyone. If it feels worse than Substack, stay.
The questions people actually ask
Is Lumail cheaper than Substack?
Sometimes. Lumail is $0 for 3,000 emails, then $20 for 40,000. Substack's number only makes sense after you know what they cap: contacts, seats, a daily send limit, or a feature they hide behind a paid plan. Read the honest take above, then price a normal month and a launch month on both pages.
What is the main difference between Lumail and Substack?
Choose Substack for the simplest hosted paid publication. Choose Lumail when you need owned infrastructure, advanced workflows, product email, and predictable SaaS pricing instead of a revenue share.
Can I migrate from Substack to Lumail?
Yes. Don't move the whole list on day one. Export a small consented sample, rebuild one campaign and one automation, authenticate your domain, then watch one subscriber go through the run. If that feels right, move the rest.