Is Kit (ConvertKit) cheaper than Substack?

At 5,000 contacts in this example snapshot, Kit (ConvertKit) is $0/mo (Kit (ConvertKit) $0/mo, Substack $0/mo). At 10,000 contacts: Kit (ConvertKit) $0/mo vs Substack $0/mo.

Which is better for ecommerce, Kit (ConvertKit) or Substack?

Neither or both are ecommerce-native in this file (Kit (ConvertKit): no; Substack: no). Use store-sync needs, not this flag alone.

Does Kit (ConvertKit) have SMS compared with Substack?

Kit (ConvertKit) has SMS in the dataset; the other does not.

Which has deeper automation?

Kit (ConvertKit) is 3/10; Substack is 1/10. The score is an editorial 1–10 in the JSON, not a vendor claim.

Head-to-head · 2–0–5 (A–B–tie)

Kit (ConvertKit) vs Substack

Kit (ConvertKit) and Substack overlap as email platforms but diverge on price, automation, and store data. At 5,000 contacts this example snapshot has Kit (ConvertKit) at $0/mo. Kit (ConvertKit) scores higher on automation depth (3/10). On the scored dimensions below, Kit (ConvertKit) leads 2, Substack leads 0, with 5 ties. This is a dataset tally, not an award.

Visit Kit (ConvertKit)Visit Substack

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Brevo: Free up to 100,000 contacts · 5k $9/mo · SMS · WhatsApp
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Affiliate disclosure

Compare Email Tools may earn a commission when you click a vendor link and purchase. That does not change table values, which come from data/esp-tools.json. Full policy: affiliate disclosure.

Dimension winners

Price at 5k contactsKit (ConvertKit): $0/moSubstack: $0/moTie
Price at 10k contactsKit (ConvertKit): $0/moSubstack: $0/moTie
Automation depth (1–10)Kit (ConvertKit): 3Substack: 1Kit (ConvertKit)
SMSKit (ConvertKit): YesSubstack: NoKit (ConvertKit)
CRMKit (ConvertKit): NoSubstack: NoTie
Ecommerce-nativeKit (ConvertKit): NoSubstack: NoTie
G2 scoreKit (ConvertKit): 4.4Substack: 4.4Tie

Kit (ConvertKit) wins more of the scored dimensions (2–0). Substack can still be the right buy when writers outweighs those rows.

Full field dump for Kit (ConvertKit) and Substack from the JSON dataset.
Tool	Free plan	Price @ 1k	Price @ 5k	Price @ 10k	Model	Automation	SMS	CRM	Ecommerce	Landing pages	Forms	G2	Trial
Kit (ConvertKit)	Free up to 10,000 contacts	$0/mo	$0/mo	$0/mo	subscribers	3/10	Yes	No	No	Yes	Yes	4.4 (n/a)	No listed trial
Substack	Free plan (contacts uncapped in dataset)	$0/mo	$0/mo	$0/mo	revenue_share	No	No	No	No	No	No	4.4 (n/a)	No listed trial

Choose Kit (ConvertKit) if

Choose Kit (ConvertKit) over Substack when creators is the job to be done.
Choose Kit (ConvertKit) over Substack when newsletter writers is the job to be done.
Choose Kit (ConvertKit) over Substack when digital products is the job to be done.
Choose Kit (ConvertKit) over Substack when coaches is the job to be done.
Free up to 10,000 contacts. No listed trial.

Skip Kit (ConvertKit) if

Do not pick Kit (ConvertKit) vs Substack if you specifically need Shopify product catalog ecommerce.
Do not pick Kit (ConvertKit) vs Substack if you specifically need complex B2B CRM automation.
Do not pick Kit (ConvertKit) vs Substack if you specifically need enterprise compliance.

Choose Substack if

Choose Substack over Kit (ConvertKit) when writers is the job to be done.
Choose Substack over Kit (ConvertKit) when newsletters is the job to be done.
Choose Substack over Kit (ConvertKit) when paid subscriptions is the job to be done.
Choose Substack over Kit (ConvertKit) when discovery is the job to be done.
Choose Substack over Kit (ConvertKit) when creators is the job to be done.
Free plan (contacts uncapped in dataset). No listed trial.

Skip Substack if

Do not pick Substack vs Kit (ConvertKit) if you specifically need native Shopify catalog sync.
Do not pick Substack vs Kit (ConvertKit) if you specifically need landing page funnels.
Do not pick Substack vs Kit (ConvertKit) if you specifically need native SMS.
Do not pick Substack vs Kit (ConvertKit) if you specifically need advanced automation.
Do not pick Substack vs Kit (ConvertKit) if you specifically need 0% take rate paid subs.

Dated pricing snapshot

Figures below are monthly USD list-size prices from data/esp-tools.json, last marked verified September 14, 2026. They are example placeholders until you swap in live quotes. Always confirm on the vendor pricing page.

Kit (ConvertKit)1k $0/mo · 5k $0/mo · 10k $0/moModel: subscribers · row date September 11, 2026
Substack1k $0/mo · 5k $0/mo · 10k $0/moModel: revenue_share · row date September 14, 2026

FAQ

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Brevo: Free up to 100,000 contacts · 5k $9/mo · SMS · WhatsApp
Moosend: No free plan · 5k $48/mo

Related comparisons

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Brevo: Free up to 100,000 contacts · 5k $9/mo · SMS · WhatsApp · Moosend: No free plan · 5k $48/mo

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