ConvertKit vs Substack: Which Email Marketing Is Better in 2026?
Compare pricing, features, integrations, verified reviews, AI capabilities, security, and customer satisfaction — side by side, with no marketing spin.
The Short Answer
ConvertKit vs Substack, in 15 seconds
Choose ConvertKit if…
- You want to trial before paying
- You want deeper AI and automation features
- You have strict security & compliance needs
Choose Substack if…
- You prefer Substack's approach and ecosystem
Head-to-Head Scorecard
How ConvertKit and Substack score
ConvertKit leads on 3 of 9 measured dimensions.
- Even
Customer Rating
Average score from verified user reviews
ConvertKitNo reviewsSubstackNo reviews - Even
Review Volume
Number of verified reviews — a proxy for adoption
ConvertKit0Substack0 - Even
Entry Pricing
Lowest published starting price (free plan = lowest)
ConvertKit$0/moSubstack$0/mo - ConvertKit
Free Access
Availability of a free plan and/or free trial
ConvertKitFree plan + trialSubstackFree plan - Even
Integrations
Number of listed third-party integrations
ConvertKit10Substack10 - Even
Features
Number of listed product capabilities
ConvertKit12Substack12 - ConvertKit
AI Features
Capabilities mentioning AI, automation or ML
ConvertKit1Substack— - ConvertKit
Security & Compliance
Number of listed compliance certifications
ConvertKit3Substack2 - Substack
Platforms & Deployment
Supported platforms and deployment options
ConvertKit3Substack5
Feature Comparison
ConvertKit vs Substack feature breakdown
Search or filter the full feature matrix — core features, AI, integrations, APIs, security and compliance.
ConvertKit
SubstackPricing Comparison
ConvertKit vs Substack pricing
Entry pricing, plan tiers and the cost factors that shape total cost of ownership.
ConvertKit
$0/mo to start- Up to 10,000 subscribers
- Unlimited broadcasts
- Landing pages and forms
- Audience tagging
- Visual Automations
- Integrations and API
- Free migration
- Sell products/subscriptions
- Everything in Creator
- Newsletter referral system
- Subscriber scoring
- Advanced reporting
Substack
$0/mo to start- Newsletter and web publishing
- Unlimited free subscribers
- Podcasts and video
- Publication website
- Paid subscription tiers
- Monthly/annual/founding options
- 10% revenue cut
- Stripe payments (~2.9% + $0.30)
Total cost of ownership factors
Beyond list price, factor in implementation, training, add-ons and per-seat scaling when estimating total cost of ownership.
Pros & Cons
ConvertKit vs Substack: strengths and trade-offs
ConvertKit
Pros
- Free plan available
- Free trial offered
- Compliance: SOC 2, GDPR, CCPA
- Stronger AI / automation features
- Public API available
Cons
Substack
Pros
- Free plan available
- Compliance: GDPR, CCPA
Cons
Buyer Fit
Who should use ConvertKit vs Substack?
Startups
Either
Either keeps early-stage costs lowest with its entry tier.
Small businesses
Either
Either offers the most accessible pricing for lean teams.
Agencies
Either
Either connects to more tools for multi-client workflows.
Enterprises
ConvertKit
ConvertKit leads on compliance and breadth for complex needs.
Ecommerce
ConvertKit
ConvertKit integrates with more of the commerce stack.
SaaS companies
ConvertKit
ConvertKit is the more developer- and automation-friendly choice.
Integration overlap
Shared integrations (2)
Only in ConvertKit (8)
Only in Substack (8)
Keep Exploring
Other alternatives worth considering
Similar email marketing products buyers compare alongside ConvertKit and Substack.
Ask SIA which solution fits your business
SIA, Saaskart's AI buying assistant, weighs ConvertKit and Substack against your team size, budget, integrations and compliance needs — then recommends the right fit and the questions to ask each vendor.
Get a personalised recommendationConvertKit vs Substack — Frequently Asked Questions
What is the difference between ConvertKit and Substack?
ConvertKit and Substack are both Email Marketing solutions. ConvertKit is rated 0.0/5 by 0 users, while Substack is rated 0.0/5 by 0 users. The main differences lie in pricing, features, and target audience.
Which is better, ConvertKit or Substack?
Based on user ratings, ConvertKit scores higher at 0.0/5. The best choice depends on your team size, budget, and specific requirements.
Which is cheaper, ConvertKit or Substack?
ConvertKit is the more affordable option, starting at $0/month.
Does ConvertKit or Substack have a free plan?
ConvertKit offers a free plan. does not have a free tier but does offer a free trial.
Can I switch from ConvertKit to Substack?
Switching between ConvertKit and Substack is possible. Both support data export. Check integration compatibility and plan for data migration to minimise disruption to your team.
Who should use ConvertKit vs Substack?
ConvertKit is best suited for teams that prioritise enterprise features. Substack works well for teams looking to start free and scale.
Our Verdict
The bottom line on ConvertKit vs Substack
Best Overall
Either
It's a tie balances user satisfaction and proven adoption.
Best for Startups
Either
It's a tie has the friendliest entry point for new teams.
Best for Enterprise
ConvertKit
ConvertKit leads on compliance and feature breadth.
Best Value
Either
It's a tie delivers the lowest cost to get started.
Best AI Features
ConvertKit
ConvertKit ships more AI and automation.
Highest Rated
Either
Both earn equal user ratings.