Customer.io review 41/100 on verified data

Customer.io is a newsletter platform: Customer engagement platform for sending behaviour-based email, push, in-app, SMS and WhatsApp messages driven by customer data.

Visit Customer.io Customer.io pricing

Data checked Oct 14, 2026 against the vendors' own pages. How we verify

Homepage captured Oct 14, 2026

Score (rank 27 of 27): 41/100
Coverage (6 of 8 criteria): 85%
From, per month: $100
Free plan: No

Customer.ioFrom $100/moVisit

Paid plans start at $100 per month billed monthly on the Essentials plan, and there is no free plan, but a free trial.

Customer.io has a public API.

In our newsletter platforms ranking Customer.io scores 41/100, rank 27 of 27, based on 6 of 8 criteria (85% of the scorecard weight backed by verified data).

Customer.io at a glance

Each value links the vendor page it was read from and the date we checked it.

Pricing model: Paid only source, Oct 14, 2026
Cheapest paid plan: Essentials: $100/mo source, Oct 14, 2026
Free plan: No source, Oct 14, 2026
Free trial: Yes source, Oct 14, 2026
Public API: Yes source, Oct 14, 2026
Data export: Data export is included on all plans source, Oct 14, 2026

Customer.io plans

3 published plans, per month, billed monthly and yearly.

Essentials
$100per month, billed monthly
Billed monthly
$100
Billed yearly
Not stated
Charged per
per workspace
Published limits
- 5,000 subscribers
- Unlimited users
- 2 workspaces
Premium
$1,000per month, billed yearly
Billed monthly
Not offered
Billed yearly
$1,000
Charged per
Not stated
Published limits
- Unlimited users
- Unlimited workspaces
Enterprise
Contact sales
Billed monthly
Contact sales
Billed yearly
Contact sales
Charged per
Not stated
Published limits
- Unlimited users
- Unlimited workspaces

Prices in USD per month, before tax. Read from the vendor's pricing page on Oct 14, 2026. "Not stated" means the page does not publish it.

Full Customer.io pricing and plan limits

How Customer.io scores

The newsletter platforms scorecard applied to Customer.io's verified data: 41/100, rank 27 of 27, based on 6 of 8 criteria.

Score

41/100

Rank #27 of 27

Coverage 85%

6 of 8 criteria. Ranked at 60% or more.

Full ranking of newsletter platforms How we score

Entry price
0/100
Weight 29%$100/month billed monthly on Essentials; $1000/month billed annually on Premium (scored on the monthly price) source
Free plan or trial
60/100
Weight 18%Free trial, no free plan source
Pricing transparency
67/100
Weight 12%2 of 3 plans have a public price (1 "contact sales") source
Verified features
60/100
Weight 18%3 of 9 tracked features verified: automations / sequences, a/b testing, segmentation and tags source
API, integrations and export
100/100
Weight 12%public API, documented data export source
Cost at 1,000 subscriberscategory criterion
0/100
Weight 12%$100 per month for 1,000 subscribers on Essentials (billed monthly) source
Free plan limitscategory criterion
Excluded
Weight –No published data: left out, the other criteria are re-weighted.
Paid subscriptionscategory criterion
Excluded
Weight –No published data: left out, the other criteria are re-weighted.

Customer.io features

3 of the 10 features we compare newsletter platforms on, as Customer.io publishes them.

Automations / sequences: Yes source, Oct 14, 2026
A/B testing: Yes source, Oct 14, 2026
Segmentation and tags: Yes source, Oct 14, 2026

8 more details we track are not published by the vendor or not verified yet (shown as – in tables). How we verify

Customer.io alternatives

The highest-scoring of 34 comparable tools.

Top Customer.io alternatives
#	Tool	Score	Coverage	From, billed monthly	From, billed yearly	Free plan	Integrations	Public API	Checked
1	Flodesk	98/100	75%5 of 8 criteria	Free	Free	Yes	–	Yes	Oct 14, 2026
2	Sender	98/100	85%6 of 8 criteria	Not offered	$9/mo	Yes, 2,500 subscribers	–	Yes	Oct 14, 2026
3	Brevo	98/100	75%5 of 8 criteria	$9/mo	Not offered	Yes	150	Yes	Oct 14, 2026
4	notifuse	93/100	85%6 of 8 criteria	$16/mo	$24.17/mo	Yes, unlimited emails per month	–	Yes	Oct 14, 2026
5	EmailOctopus	92/100	85%6 of 8 criteria	Not offered	$9/mo	Yes, 2,500 subscribers	1,000	Yes	Oct 14, 2026

Each value links the vendor page it was read from (hover for the check date). Coverage is the share of the scorecard's weight with verified data, and "N of M criteria" how many criteria the score is based on; a tool is ranked at 60% or more.

All 34 Customer.io alternatives, ranked

More ways to weigh up Customer.io

Competitors, cheaper and open-source options, computed from the same verified data as this page.

Compare Customer.io

Questions, answered from the data

How much does Customer.io cost?

Paid plans start at $100 per month billed monthly on the Essentials plan, according to Customer.io's pricing page (checked Oct 14, 2026).

Does Customer.io have a free plan?

No: Customer.io has no free plan, but a free trial (checked Oct 14, 2026).

Does Customer.io have an API?

Yes, a public API is documented (checked Oct 14, 2026).

How does Customer.io score?

In our newsletter platforms ranking Customer.io scores 41/100, rank 27 of 27, based on 6 of 8 criteria (85% of the scorecard weight backed by verified data).

What are the best Customer.io alternatives?

By our scorecard the top-ranked alternatives are Flodesk (98/100), Sender (98/100) and Brevo (98/100).

Customer.io

Rankings it appears in

Best newsletter platforms

Platforms

Pricing last read Oct 14, 2026. Vendors change prices; the linked page is the final word.