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Compare Customer.io and Twilio SendGrid Email API 
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At a Glance
Market Segments
Small-Business (59.6% of reviews)
Small-Business (68.6% of reviews)
Entry-Level Pricing
Starting at $100.00 Per Month
$14.95 to $29.95 per month
Customer.io
Star Rating
(656)4.4 out of 5
Market Segments
Small-Business (59.6% of reviews)
Pros & Cons
Entry-Level Pricing
Starting at $100.00 Per Month
Free Trial is available
Browse all 3 pricing plansTwilio SendGrid Email API
Star Rating
(359)4.0 out of 5
Market Segments
Small-Business (68.6% of reviews)
Pros & Cons
Entry-Level Pricing
$14.95 to $29.95 per month
Browse all 3 pricing plansSummary
AI Generated Summary
AI-generated. Powered by real user reviews.
- Users report that Twilio SendGrid Email API excels in "Email Campaigns" with a high score of 9.6, making it a preferred choice for those focused on email marketing. In contrast, Customer.io, while strong in "Email Segmentation" with a score of 9.1, does not match the overall email campaign performance of Twilio.
- Reviewers mention that Customer.io shines in "Quality of Support" with a score of 8.8, significantly higher than Twilio SendGrid's 7.6. This indicates that users may find more responsive and helpful customer service with Customer.io, which can be crucial for businesses needing timely assistance.
- G2 users highlight that Twilio SendGrid's "Mail Send API" received an impressive score of 9.3, showcasing its robust capabilities for sending emails programmatically. Customer.io's "Event Tracking API" scored 8.7, which is solid but does not quite reach the same level of performance in email delivery.
- Users on G2 report that Customer.io's "Automated Email Responses" feature scored 8.4, indicating a strong capability in automating customer interactions. However, Twilio SendGrid's score of 8.4 in the same category suggests that both platforms offer similar automation features, but Customer.io may have a slight edge in user experience.
- Reviewers mention that Twilio SendGrid's "Performance and Reliability" score of 8.8 is a strong point, indicating consistent email delivery and uptime. In comparison, Customer.io's score of 9.0 is slightly higher, suggesting that it may offer even better reliability, which is critical for businesses relying on email communications.
- Users say that Twilio SendGrid's "Template Creation" feature is rated at 8.0, which is on par with Customer.io's 8.0. However, Customer.io's focus on "Email Segmentation" with a score of 9.1 indicates a more advanced capability in targeting specific audiences, which can enhance marketing effectiveness.
Pricing
Entry-Level Pricing
Customer.io
Essentials
Starting at $100.00
Per Month
For small companies who are gaining momentum.
- Send emails, push, in-app, SMS, webhooks
- Track custom events and attributes
- Visual workflow builder
Twilio SendGrid Email API
ESSENTIALS (40K, 100K Packages)
$14.95 to $29.95
per month
Two packages to meet your mail sending needs
- Easy to Use APIs and Webhooks
- Detailed Analytics and Reporting
- DKIM Customization
Free Trial
Customer.io
Free Trial is available
Twilio SendGrid Email API
Free Trial is available
Ratings
Meets Requirements
8.7
586
8.5
310
Ease of Use
8.3
597
8.2
312
Ease of Setup
7.9
399
8.2
174
Ease of Admin
8.6
275
8.2
173
Quality of Support
8.7
524
7.5
248
Has the product been a good partner in doing business?
9.0
273
7.8
162
Product Direction (% positive)
9.2
576
7.2
297
Features by Category
Email Marketing
8.8
409
|
Verified
Not enough data
8.8
394
|
Verified
Not enough data
8.4
388
|
Verified
Not enough data
8.3
368
|
Verified
Not enough data
Online Marketing
6.3
329
Not enough data
7.9
354
|
Verified
Not enough data
8.3
378
|
Verified
Not enough data
7.9
357
|
Verified
Not enough data
Feature Not Available
Not enough data
Lead Management
7.4
331
|
Verified
Not enough data
7.6
332
Not enough data
8.6
371
|
Verified
Not enough data
6.8
312
Not enough data
7.6
332
|
Verified
Not enough data
7.3
327
|
Verified
Not enough data
7.3
316
Not enough data
7.3
323
|
Verified
Not enough data
Campaign Management
7.7
338
Not enough data
7.0
321
Not enough data
Feature Not Available
Not enough data
Feature Not Available
Not enough data
Social
Feature Not Available
Not enough data
6.5
307
Not enough data
Feature Not Available
Not enough data
Feature Not Available
Not enough data
Feature Not Available
Not enough data
Reporting & Analytics
7.7
371
|
Verified
Not enough data
6.9
333
|
Verified
Not enough data
6.5
323
Not enough data
6.3
312
Not enough data
Feature Not Available
Not enough data
Platform
8.2
365
|
Verified
Not enough data
8.5
361
|
Verified
Not enough data
8.5
358
|
Verified
Not enough data
7.8
330
|
Verified
Not enough data
7.7
348
|
Verified
Not enough data
8.8
358
|
Verified
Not enough data
7.2
313
|
Verified
Not enough data
Agentic AI - Marketing Automation
6.3
66
Not enough data
6.4
67
Not enough data
6.7
62
Not enough data
6.3
64
Not enough data
6.2
63
Not enough data
6.3
65
Not enough data
Integration
8.3
373
|
Verified
Not enough data
8.3
366
|
Verified
Not enough data
7.6
336
|
Verified
Not enough data
Administration
8.1
266
7.9
85
7.4
236
7.5
77
8.1
252
8.1
83
8.9
265
8.1
89
7.7
238
7.9
97
7.8
244
8.3
100
Integrations
8.6
237
8.9
91
8.5
241
8.7
83
8.4
205
9.3
120
7.2
178
8.3
72
Platform
8.2
210
9.2
86
8.2
205
8.7
70
7.9
200
8.6
74
8.2
240
|
Verified
8.4
116
7.8
218
8.3
109
8.2
241
8.3
121
7.9
216
8.6
87
8.8
238
8.7
126
Diagnosis
Not enough data
8.3
96
Not enough data
8.9
104
Not enough data
8.5
97
Not enough data
8.7
96
Tracking
Not enough data
8.9
115
Not enough data
8.4
99
Not enough data
8.7
115
Not enough data
8.5
107
Not enough data
8.4
102
Reporting
Not enough data
8.3
97
Not enough data
8.1
108
Not enough data
8.3
93
Not enough data
8.0
107
Agentic AI - Email Deliverability
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Campaigns
8.6
115
Not enough data
8.7
112
Not enough data
8.2
107
Not enough data
8.8
120
Not enough data
8.8
114
Not enough data
Analytics
8.4
114
Not enough data
7.6
105
Not enough data
Optimization
8.5
112
Not enough data
8.9
114
Not enough data
8.0
110
Not enough data
8.4
112
Not enough data
Agentic AI - Push Notification
6.4
14
Not enough data
6.9
14
Not enough data
6.5
14
Not enough data
Text Messaging
8.4
84
Not enough data
Feature Not Available
Not enough data
8.2
80
Not enough data
Feature Not Available
Not enough data
6.8
75
Not enough data
6.5
77
Not enough data
8.7
87
Not enough data
8.2
79
Not enough data
SMS Platform
7.5
82
Not enough data
8.3
85
Not enough data
7.2
73
Not enough data
6.2
71
Not enough data
6.7
71
Not enough data
8.3
83
Not enough data
Agentic AI - SMS Marketing
6.4
17
Not enough data
6.4
17
Not enough data
7.5
17
Not enough data
7.2
17
Not enough data
7.0
17
Not enough data
6.7
18
Not enough data
Data Sourcing
7.5
93
Not enough data
7.7
95
Not enough data
7.3
97
Not enough data
8.2
95
Not enough data
Intelligence
7.3
91
Not enough data
5.8
88
Not enough data
5.9
87
Not enough data
Agentic AI - Personalization
5.4
32
Not enough data
6.3
33
Not enough data
5.7
32
Not enough data
5.7
32
Not enough data
5.4
32
Not enough data
5.5
33
Not enough data
Analysis
Feature Not Available
Not enough data
8.0
69
Not enough data
6.2
56
Not enough data
Feature Not Available
Not enough data
Campaigns
7.3
57
Not enough data
8.0
62
Not enough data
7.3
61
Not enough data
Feature Not Available
Not enough data
9.3
69
Not enough data
9.2
70
Not enough data
Engagement
6.9
54
Not enough data
Platform
8.0
62
Not enough data
Feature Not Available
Not enough data
7.6
60
Not enough data
Agentic AI - Mobile Marketing
6.7
6
Not enough data
7.2
6
Not enough data
6.1
6
Not enough data
6.7
6
Not enough data
6.4
6
Not enough data
6.9
6
Not enough data
Categories
Categories
Shared Categories
Customer.io and Twilio SendGrid Email API are categorized as Transactional Email
Unique Categories
Customer.io is categorized as SMS Marketing, Personalization, Push Notification, Mobile Marketing, Marketing Automation, and Customer Data Platform (CDP)
Twilio SendGrid Email API is categorized as Email Deliverability
Reviews
Reviewers' Company Size
Customer.io
Small-Business(50 or fewer emp.)
Mid-Market(51-1000 emp.)
Enterprise(> 1000 emp.)
Twilio SendGrid Email API
Small-Business(50 or fewer emp.)
Mid-Market(51-1000 emp.)
Enterprise(> 1000 emp.)
Small-Business
(50 or fewer emp.)
Mid-Market
(51-1000 emp.)
Enterprise
(> 1000 emp.)
Reviewers' Industry
Computer Software
14.8%
Financial Services
13.4%
Information Technology and Services
9.5%
Marketing and Advertising
7.9%
Health, Wellness and Fitness
4.8%
Other
49.6%
Computer Software
18.1%
Information Technology and Services
13.8%
Marketing and Advertising
8.6%
Internet
7.2%
Financial Services
5.5%
Other
46.8%
Alternatives
Discussions
What is Customer.io used for?
2 Comments
HV
Customer.io is a tool that helps businesses send personalized messages like emails, texts, and app notifications. It’s used to stay connected with customers,...Read more
What is the best way to make automations a smoother process?
1 Comment
RJ
Start small workflows. Make use of the content that your marketing and sales teams have. Use Goals. Know when to unenroll the contacts from the automation...Read more
Can I send from more than one domain through SendGrid?
1 Comment
BF
Yes, you can. Here is a more detailed answer from Sendgrid's Docs:...Read more
What is my API Key?
1 Comment
TD
API key is authorization key between two different application or platform. Read more
Twilio SendGrid Email API has no more discussions with answers
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