Mailjet vs Substack
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
Mailjet is the stronger AI pick in Email Marketing: it has a visibility score of 3.8 versus 0 for Substack.
Choose Mailjet if…
- You want the brand AI engines rank higher (3.8 vs 0)
- You need ISO 27001 or ISO 27701 or SOC 2 or GDPR or CCPA or PCI DSS or CSA STAR Level 1 or HIPAA or Certified Senders Alliance coverage
- straightforward annual pricing discount
Choose Substack if…
No clear advantage in the published data.
AI visibility side by side
Latest weekly run · Nov 2
| Metric | Mailjet | Substack |
|---|---|---|
| Visibility score | 3.8% | 0% |
| Change vs last week | New | New |
| Rank in Email Marketing | #19 | #55 |
| Share of voice | 1.7% | 0% |
| Mentions this run | 9 | 0 |
| Positive in AI answers | 0% | — |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
Mailjet 0pp · Substack 0pp over 0 weekly runs.
Engine by engine
Mailjet leads on 3 of 3 engines
Head to head in AI answers
0 engine answers name both brands
Features, pricing & fit
| Dimension | Mailjet | Substack |
|---|---|---|
| Pricing model | Flat tiers | — |
| Entry price | Free; paid from $9 / mo | — |
| Free plan | Yes | — |
| Deployment | Cloud-hosted in EU data centers | — |
| Integrations | 100+ | — |
| Compliance | ISO 27001, ISO 27701, SOC 2, GDPR, CCPA, PCI DSS, CSA STAR Level 1, HIPAA, Certified Senders Alliance | — |
| Support | Online support, Priority support (Premium plan), Phone and chat support (from 50k plan), Dedicated Technical Account Manager (Custom plan) | Help center, Resource center, Community and programs |
| Founded | 2010 | 2017 |
| Headquarters | Paris, France | — |
| Employees | 51–200 | — |
| Funding | Series Unknown (investment by Entrepreneur Venture, amount undisclosed) | Series C · $200M raised |
| Best for | Marketing and development teams that want marketing and transactional email on one platform | Writers, journalists, podcasters, video creators and media companies that want to sell subscriptions directly to readers |
Plans side by side
Mailjet
Substack
Pricing not available.
Pros and cons
Themes from the AI answers that mention each brand
Mailjet
- straightforward annual pricing discount
Substack
Profile in progress.
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “Mailjet vs Substack”, https://slateindex.ai/compare/mailjet-vs-substack, data of Nov 2, 2026. Licence: CC BY 4.0.