Kit (ConvertKit) and Substack both sit in the newsletters category, which is the first thing to note about this comparison: the head-to-head is about which tool earns the seat. On the 8020 rubric, Substack scores 96 against Kit (ConvertKit) at 89. The gap is meaningful on some dimensions and narrow on others — the rest of this page explains exactly where.
What's the real difference between Kit (ConvertKit) and Substack?
Kit (ConvertKit) is built for course creators and coaches. Substack is built for independent writers. The tools overlap on surface features but diverge on the workflow each is designed around — Kit (ConvertKit) optimises for visual automation builder for complex subscriber journeys, while Substack optimises for free publishing with no monthly fee — substack takes 10% of paid subscription revenue.
Kit (ConvertKit)'s positioning: Kit is the only newsletter platform with a mature visual automation builder and built-in commerce layer — letting creators run email marketing, product sales, and subscriber journeys in one system without Zapier stitching.
Substack's positioning: Substack's reader network and recommendation engine give new writers an organic discovery path — no other newsletter platform has a built-in reader app with social following at this scale.
The 8020 rubric weighs four things — value for money (30%), depth and power (30%), time to results (25%), and ecosystem (15%). Kit (ConvertKit) scores 86/89/90/94 on those dimensions; Substack scores 99/99/99/99. The biggest spread is on value for money — see the table above.
When should you pick Kit (ConvertKit)?
Pick Kit (ConvertKit) when course creators and coaches is the job that has to be done well. Its free tier covers course creators and coaches without a credit card, and the 8020 Score of 89 reflects how well it executes against its rubric.
Kit (ConvertKit) is the right call when:
- Course creators and coaches.
- Bloggers with product funnels.
- Creators managing paid and free subscriber segments.
- You want to evaluate it before committing budget — the free tier is real, not a teaser.
- Your stack already includes one of the 7 platforms it integrates with.
Kit (ConvertKit)'s standout capabilities — verified per the vendor's published specs (May 2026) — include visual automation builder for complex subscriber journeys, paid newsletter support through kit commerce (built-in product selling), tag and segment-based subscriber management with no list duplication fees. These are the features that earn the Essential tier on the rubric.
When should you pick Substack?
Pick Substack when independent writers is the job that has to be done well. Its free tier covers independent writers without a credit card, and the 8020 Score of 96 reflects how well it executes against its rubric.
Substack is the right call when:
- Independent writers.
- Journalists going solo.
- Creators with a strong personal brand.
- You want to evaluate it before committing budget — the free tier is real, not a teaser.
- Your stack already includes one of the 5 platforms it integrates with.
Substack's standout capabilities — verified per the vendor's published specs (May 2026) — include free publishing with no monthly fee — substack takes 10% of paid subscription revenue, built-in paid subscription layer powered by stripe, reader app for ios and android with social discovery and recommendations. These are the features that earn the Essential tier on the rubric.
How much do Kit (ConvertKit) and Substack cost?
Kit (ConvertKit) starts at $33 per user per month on a freemium (free tier + paid plans) model. Substack starts at custom enterprise pricing on a free model. The two are priced comparably. Pricing verified May 2026.
Kit (ConvertKit): Free tier available. Lowest paid plan: $33/user/mo. Pricing model: freemium (free tier + paid plans). Substack: Free tier available. Lowest paid plan: Custom. Pricing model: free.
Entry pricing only tells you where the meter starts. Real spend scales with seats, usage limits, and the plan tier where the features you actually need become available. Check each vendor's pricing page for the tier that matches your team size — and verify it matches our last-verified date before signing.
Kit (ConvertKit) — strengths and trade-offs
What Kit (ConvertKit) does well, where it falls short. Both lists draw from our hands-on testing against the Essential criteria. The full review is on the Kit (ConvertKit) profile.
Strengths
- Best-in-class visual automations for nurture sequences and product funnels
- Subscriber tagging replaces list segmentation — pay for each subscriber once, not per list
- Kit Commerce lets you sell digital products directly without a third-party cart
- Creator Network provides organic newsletter growth via cross-promotion
Trade-offs
- Free tier capped at 10,000 subscribers — pricing scales steeply after that
- Email template editor is dated compared to Beehiiv and Mailchimp
- Reporting dashboard is functional but not as deep as dedicated analytics tools
- Rebrand from ConvertKit to Kit in 2024 caused some brand confusion for long-time users
Substack — strengths and trade-offs
What Substack does well, where it falls short. Both lists draw from our hands-on testing against the Essential criteria. The full review is on the Substack profile.
Strengths
- Zero upfront cost — no monthly fee until you earn money
- Distribution network built in — Substack's recommendation engine surfaces new writers
- One login covers newsletter, podcast, and video for paid subscribers
- Readers already have Substack accounts and credit cards saved, lowering upgrade friction
Trade-offs
- 10% revenue share becomes expensive at scale — a $500K ARR newsletter pays $50K/year to Substack
- No custom domain on free tier without paying a $50/year flat fee
- Email design and customization are minimal compared to Kit or Ghost
- Analytics are thin — no heatmaps, no click-maps, no A/B testing
What are the alternatives to Kit (ConvertKit) and Substack?
If neither Kit (ConvertKit) nor Substack is the right fit, the closest alternatives are the other tools in the newsletters category. Both lists are ranked by 8020 Score — start with the top of the relevant category and work down.
Kit (ConvertKit) alternatives we cover: Beehiiv, Mailchimp, Substack.
Substack alternatives we cover: Beehiiv, Ghost.
Frequently asked questions
Is Kit (ConvertKit) or Substack better overall?
Neither is strictly better — they serve different jobs. Substack takes the 8020 composite (96 vs 89) on the rubric, while Kit (ConvertKit) earns its tier (Essential) when its specific strengths match your situation. The decision turns on the four dimensions in the table above.
How much do Kit (ConvertKit) and Substack cost?
Kit (ConvertKit) starts at $33 per user per month on a freemium (free tier + paid plans) model; Substack starts at custom enterprise pricing on a free model. Kit (ConvertKit) has a free tier; Substack has a free tier. Pricing verified May 2026.
Does Kit (ConvertKit) integrate with the same tools as Substack?
Kit (ConvertKit) lists 7 verified integrations in our directory; Substack lists 5. Both connect to the major platforms most teams already use. Specific integration availability depends on plan tier — see each tool profile for the full integration list.
Can Kit (ConvertKit) replace Substack?
Only if your use case maps to Kit (ConvertKit)'s strengths. Kit is the only newsletter platform with a mature visual automation builder and built-in commerce layer — letting creators run email marketing, product sales, and subscriber journe… If Substack's specific job is your primary need, it earns its seat.
Which has the better free tier, Kit (ConvertKit) or Substack?
Both Kit (ConvertKit) and Substack ship a free tier. Kit (ConvertKit)'s free tier suits course creators and coaches; Substack's suits independent writers. Specific limits are listed on each vendor's pricing page.
