Compare Apollo.io and TheirStack 
At a Glance
Market Segments
Small-Business (67.2% of reviews)
Small-Business (91.7% of reviews)
Entry-Level Pricing
Free 1 user Per Month
No pricing available
Apollo.io
Star Rating
(9,531)4.7 out of 5
Market Segments
Small-Business (67.2% of reviews)
Pros & Cons
Entry-Level Pricing
Free 1 user Per Month
Free Trial is available
Browse all 4 pricing plansTheirStack
Star Rating
(12)4.8 out of 5
Market Segments
Small-Business (91.7% of reviews)
Pros & Cons
Entry-Level Pricing
No pricing available
Learn more about TheirStackSummary
AI Generated Summary
AI-generated. Powered by real user reviews.
- G2 reviewers report that Apollo.io excels in providing comprehensive contact information, which users find invaluable for lead generation. One user highlighted its ability to run email sequences for cold outreach, noting that the AI-generated email suggestions significantly enhance personalization.
- Users say TheirStack stands out for its exceptional communication and support. Reviewers appreciate the responsiveness of the team, mentioning that they can easily reach out via Slack for any issues or new use cases, which fosters a collaborative working relationship.
- According to verified reviews, Apollo.io has a more extensive user base, with over 9,200 reviews compared to TheirStack's 12. This larger volume of feedback contributes to a more reliable understanding of its performance and user satisfaction, reflected in its strong G2 Score of 85.5.
- Reviewers mention that while Apollo.io offers a user-friendly experience with a straightforward setup process, TheirStack users rate its ease of use even higher. TheirStack's intuitive interface and seamless API integration have been praised, making it a strong contender for those prioritizing simplicity.
- Users highlight Apollo.io's affordability, especially for small businesses, as it offers a free entry-level option. This makes it an attractive choice for startups looking to leverage sales data and prospecting tools without a significant financial commitment.
- G2 reviewers note that while Apollo.io has a solid product direction and meets user requirements effectively, TheirStack's support quality is notably higher. Users have rated TheirStack's support at 9.8, indicating a strong commitment to customer satisfaction and assistance.
Pricing
Entry-Level Pricing
Apollo.io
Free
Free
1 user Per Month
Unlimited email credits, 5 mobile credits per month, 10 export credits per month
- Basic Sequence Automation (2 Sequence Limit)
- Basic Filters
- Buying Intent (3 Intent Topic Limit)
TheirStack
No pricing availableFree Trial
Apollo.io
Free Trial is available
TheirStack
No trial information availableRatings
Meets Requirements
9.1
7,461
8.8
12
Ease of Use
9.0
7,560
9.4
12
Ease of Setup
8.9
3,787
9.4
12
Ease of Admin
9.1
2,475
Not enough data
Quality of Support
8.8
6,396
9.8
11
Has the product been a good partner in doing business?
9.2
2,457
Not enough data
Product Direction (% positive)
9.4
7,180
9.0
12
Features by Category
Data Availability
8.8
2673
Not enough data
8.9
2599
Not enough data
8.6
2423
Not enough data
7.5
598
Not enough data
Data Accuracy
8.3
2616
Not enough data
8.6
2514
Not enough data
7.4
580
Not enough data
Agentic AI - Sales Intelligence
7.7
194
Not enough data
7.8
192
Not enough data
7.6
187
Not enough data
7.6
189
Not enough data
7.4
187
Not enough data
7.7
187
Not enough data
Platform
8.4
1149
Not enough data
8.8
1727
|
Verified
Not enough data
8.9
1854
Not enough data
8.6
1686
|
Verified
Not enough data
7.7
1337
|
Verified
Not enough data
8.3
1341
Not enough data
Features
8.9
2177
Not enough data
8.6
1905
Not enough data
8.5
1971
|
Verified
Not enough data
8.7
2107
|
Verified
Not enough data
9.0
2454
|
Verified
Not enough data
8.2
1660
Not enough data
8.2
1085
Not enough data
8.4
1874
|
Verified
Not enough data
8.5
1808
|
Verified
Not enough data
Lead Intelligence
8.1
575
Not enough data
8.2
571
Not enough data
8.3
570
Not enough data
Lead Management
8.5
586
Not enough data
7.8
578
Not enough data
8.4
575
Not enough data
Marketing Campaigns
Feature Not Available
Not enough data
7.4
557
Not enough data
7.4
548
Not enough data
7.7
548
Not enough data
7.9
550
Not enough data
Campaign Execution
Feature Not Available
Not enough data
8.0
548
Not enough data
7.9
539
Not enough data
8.3
541
Not enough data
Agentic AI - Account Data Management
8.3
21
Not enough data
8.3
21
Not enough data
8.2
21
Not enough data
7.9
21
Not enough data
8.2
21
Not enough data
Core Conversational Capabilities - AI Chatbots
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Data
Not enough data
Not enough data
Not enough data
Not enough data
Interaction
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
Task & Flow Management - AI Chatbots
Not enough data
Not enough data
Not enough data
Not enough data
Learning
Not enough data
Not enough data
Not enough data
Not enough data
Deployment & Embedding - AI Chatbots
Not enough data
Not enough data
Not enough data
Not enough data
Content Generation
Not enough data
Not enough data
Not enough data
Not enough data
Admin & Configuration - AI Chatbots
Not enough data
Not enough data
System
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Agentic AI - AI Chatbots
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
Not enough data
Not enough data
Not enough data
Not enough data
Monitoring & Improvement - AI Chatbots
Not enough data
Not enough data
Reliability & Safety - AI Chatbots
Not enough data
Not enough data
Lead Generation
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
Lead Facilitation
7.6
671
Not enough data
8.3
711
Not enough data
8.4
707
Not enough data
8.0
676
Not enough data
Organization
8.3
681
Not enough data
8.3
682
Not enough data
8.3
675
Not enough data
Performance Analysis
7.9
696
Not enough data
8.4
713
Not enough data
Sales Analysis
7.8
684
Not enough data
8.0
689
Not enough data
Generative AI
7.9
568
Not enough data
7.9
566
Not enough data
Agentic AI - AI Sales Assistant
7.8
37
Not enough data
8.0
37
Not enough data
8.0
37
Not enough data
8.2
37
Not enough data
7.9
37
Not enough data
7.7
36
Not enough data
8.3
36
Not enough data
Diagnosis
7.6
406
Not enough data
7.7
406
Not enough data
7.9
404
Not enough data
8.1
398
Not enough data
Tracking
8.0
404
Not enough data
7.8
395
Not enough data
8.3
403
Not enough data
8.0
399
Not enough data
7.9
389
Not enough data
Reporting
8.2
393
Not enough data
8.1
390
Not enough data
7.8
384
Not enough data
7.5
383
Not enough data
Agentic AI - Email Deliverability
7.8
68
Not enough data
7.7
65
Not enough data
7.6
64
Not enough data
7.6
65
Not enough data
7.4
65
Not enough data
Integrated Workflows
8.6
2256
|
Verified
Not enough data
9.0
2609
|
Verified
Not enough data
8.0
1831
|
Verified
Not enough data
8.4
2054
Not enough data
8.5
2178
|
Verified
Not enough data
8.4
1912
Not enough data
8.4
1931
Not enough data
Repeatability and Reportability
8.5
2066
|
Verified
Not enough data
8.7
2134
|
Verified
Not enough data
8.7
2119
|
Verified
Not enough data
8.3
1985
|
Verified
Not enough data
Feature Not Available
Not enough data
AI and Automation
8.6
2161
Not enough data
8.5
2135
Not enough data
8.5
1992
Not enough data
8.3
1936
Not enough data
8.1
1778
Not enough data
Generative AI
7.7
981
Not enough data
Agentic AI - Sales Engagement
7.4
121
Not enough data
7.6
119
Not enough data
7.2
121
Not enough data
7.3
121
Not enough data
7.2
120
Not enough data
7.2
123
Not enough data
7.5
122
Not enough data
Dialing Options
7.9
80
Not enough data
Feature Not Available
Not enough data
6.3
9
Not enough data
Agent Tools
6.7
77
Not enough data
6.9
79
Not enough data
7.8
80
Not enough data
Automation
6.9
77
Not enough data
6.8
77
Not enough data
7.1
77
Not enough data
Agentic AI - Auto Dialer
8.2
10
Not enough data
8.2
10
Not enough data
AI Capabilities - Auto Dialer
5.7
9
Not enough data
6.5
8
Not enough data
6.7
8
Not enough data
Call Analytics
8.5
118
Not enough data
8.4
116
Not enough data
8.7
117
Not enough data
8.5
118
Not enough data
Artificial Intelligence - Conversation Intelligence
8.4
115
Not enough data
8.3
114
Not enough data
Not enough data
Not enough data
Generative AI
8.6
104
Not enough data
Agentic AI - Conversation Intelligence
7.7
8
Not enough data
7.3
8
Not enough data
7.7
8
Not enough data
7.1
8
Not enough data
6.5
8
Not enough data
7.1
8
Not enough data
7.4
7
Not enough data
Grammar
8.8
215
Not enough data
8.4
211
Not enough data
8.6
211
Not enough data
Formatting
Feature Not Available
Not enough data
Feature Not Available
Not enough data
Feature Not Available
Not enough data
Content
8.5
199
Not enough data
8.6
204
Not enough data
Feature Not Available
Not enough data
Product Type
Feature Not Available
Not enough data
Feature Not Available
Not enough data
Generative AI
8.4
169
Not enough data
8.4
170
Not enough data
Data Availability
8.4
244
Not enough data
8.5
251
Not enough data
7.6
240
Not enough data
Platform Additional Functionality
8.4
256
Not enough data
8.1
245
Not enough data
7.6
240
Not enough data
8.1
242
Not enough data
Feature Not Available
Not enough data
Voice
Feature Not Available
Not enough data
8.3
45
Not enough data
Transcription
8.3
45
Not enough data
8.1
44
Not enough data
Feature Not Available
Not enough data
8.0
44
Not enough data
Editing
8.3
44
Not enough data
8.0
44
Not enough data
8.4
44
Not enough data
8.1
43
Not enough data
Integration
7.8
44
Not enough data
7.7
45
Not enough data
Feature Not Available
Not enough data
Feature Not Available
Not enough data
7.8
44
Not enough data
Agentic AI - Transcription
5.7
5
Not enough data
6.3
5
Not enough data
6.0
5
Not enough data
Lead Intelligence
8.9
3311
|
Verified
Not enough data
8.9
3160
|
Verified
Not enough data
8.8
3354
|
Verified
Not enough data
8.8
3029
|
Verified
Not enough data
9.2
3129
Not enough data
Agentic AI - Lead Intelligence
8.0
78
Not enough data
Lead Monitoring
8.7
905
Not enough data
8.5
900
Not enough data
8.4
897
Not enough data
Agentic AI - Lead Capture
7.7
104
Not enough data
7.5
102
Not enough data
Data Capture
8.0
893
Not enough data
8.4
857
Not enough data
8.1
852
Not enough data
8.5
882
Not enough data
Analytics
8.6
880
Not enough data
8.5
866
Not enough data
Customization
8.1
853
Not enough data
8.3
870
Not enough data
8.3
849
Not enough data
8.5
874
Not enough data
Data collection
Not enough data
Not enough data
Not enough data
8.7
5
Not enough data
8.3
5
Not enough data
Not enough data
Not enough data
Not enough data
Segment Trending
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Analysis
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
8.3
5
Platform
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
Not enough data
Not enough data
Agentic AI - Market Intelligence
Not enough data
Not enough data
Not enough data
Not enough data
Matching
8.5
156
Not enough data
8.1
153
Not enough data
8.1
152
Not enough data
Routing
8.3
152
Not enough data
8.3
148
Not enough data
8.3
149
Not enough data
8.6
146
Not enough data
Platform Operations
8.3
149
Not enough data
8.3
144
Not enough data
8.3
148
Not enough data
8.0
147
Not enough data
8.4
148
Not enough data
8.5
150
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Revenue Sourcing and Forecasting
7.8
50
Not enough data
8.4
51
Not enough data
8.0
50
Not enough data
8.0
48
Not enough data
8.3
50
Not enough data
7.7
49
Not enough data
8.1
50
Not enough data
CRM Data Enrichment
8.6
50
Not enough data
8.4
49
Not enough data
8.4
49
Not enough data
8.6
50
Not enough data
8.4
48
Not enough data
Account Management
8.1
48
Not enough data
8.2
48
Not enough data
7.9
48
Not enough data
8.2
48
Not enough data
8.1
48
Not enough data
8.0
48
Not enough data
Agentic AI - Revenue Operations & Intelligence (RO&I)
8.2
17
Not enough data
8.4
17
Not enough data
8.4
17
Not enough data
8.1
17
Not enough data
8.7
17
Not enough data
Calendar View
7.7
59
Not enough data
7.6
59
Not enough data
Shared Calendar
7.6
58
Not enough data
7.7
59
Not enough data
Accessibility
8.0
58
Not enough data
7.5
59
Not enough data
Integration
7.9
59
Not enough data
8.0
58
Not enough data
7.6
59
Not enough data
Notifications
7.6
58
Not enough data
7.5
56
Not enough data
Generative AI
Feature Not Available
Not enough data
Feature Not Available
Not enough data
Feature Not Available
Not enough data
Agentic AI - Calendar
8.2
10
Not enough data
Integrations
7.2
92
Not enough data
8.6
98
Not enough data
7.7
90
Not enough data
8.0
91
Not enough data
7.7
88
Not enough data
Branding & Customizatio
7.8
87
Not enough data
7.9
91
Not enough data
7.8
87
Not enough data
Automatic Rules & Configurations
8.6
92
Not enough data
8.7
88
Not enough data
8.3
88
Not enough data
Agentic AI - Business Scheduling
7.5
20
Not enough data
8.1
20
Not enough data
Generative AI
7.7
705
Not enough data
Feature Not Available
Not enough data
Agentic AI - Email Verification
8.0
98
Not enough data
Meeting Prep - AI Meeting Assistants
7.4
21
Not enough data
6.8
21
Not enough data
6.7
21
Not enough data
Meeting Automation - AI Meeting Assistants
8.1
20
Not enough data
7.8
20
Not enough data
7.2
19
Not enough data
Meeting Insights - AI Meeting Assistants
7.4
19
Not enough data
7.3
20
Not enough data
7.3
20
Not enough data
Accessibility - AI Meeting Assistants
6.7
20
Not enough data
6.8
20
Not enough data
7.3
20
Not enough data
Agentic AI - AI Meeting Assistants
6.4
7
Not enough data
6.4
7
Not enough data
6.4
7
Not enough data
6.9
7
Not enough data
Meeting Capture & Retention - AI Meeting Assistants
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Agentic AI - Lead Mining
8.0
80
Not enough data
7.6
78
Not enough data
Agentic AI - Visitor Identification
8.3
7
Not enough data
Agentic AI - Lead Scoring
8.2
48
Not enough data
8.4
48
Not enough data
7.9
47
Not enough data
7.9
48
Not enough data
Attribution
8.9
363
Not enough data
8.9
360
Not enough data
8.6
334
Not enough data
Discovery
9.0
369
Not enough data
8.6
342
Not enough data
8.7
361
Not enough data
Management
8.5
332
Not enough data
8.7
356
Not enough data
Platform
8.7
337
Not enough data
8.8
343
Not enough data
Agentic AI - Sales Performance Management
7.9
23
Not enough data
8.5
22
Not enough data
8.0
22
Not enough data
Incentives
Feature Not Available
Not enough data
Feature Not Available
Not enough data
Feature Not Available
Not enough data
7.9
228
Not enough data
Personalization
Feature Not Available
Not enough data
8.3
236
Not enough data
8.5
242
Not enough data
8.3
235
Not enough data
Administrative
8.4
236
Not enough data
8.4
230
Not enough data
8.2
230
Not enough data
Agentic AI - Email Tracking
7.8
90
Not enough data
7.7
90
Not enough data
7.7
90
Not enough data
7.7
89
Not enough data
7.5
89
Not enough data
7.6
88
Not enough data
7.6
88
Not enough data
Analytics
8.4
728
Not enough data
8.3
717
Not enough data
8.0
706
Not enough data
Customizations
8.5
718
Not enough data
8.8
723
Not enough data
8.4
723
Not enough data
8.3
714
Not enough data
8.5
704
Not enough data
Generative AI
7.9
617
Not enough data
Agentic AI - Outbound Call Tracking
7.8
44
Not enough data
7.9
44
Not enough data
Calling
8.1
331
Not enough data
7.9
324
Not enough data
8.1
320
Not enough data
8.3
317
Not enough data
7.5
47
Not enough data
Contacts
8.3
321
Not enough data
8.1
314
Not enough data
8.3
318
Not enough data
Insights
8.3
315
Not enough data
8.2
314
Not enough data
7.8
308
Not enough data
8.5
314
Not enough data
8.2
306
Not enough data
8.2
46
Not enough data
Agentic AI - Sales Coaching
8.9
11
Not enough data
9.1
11
Not enough data
8.9
11
Not enough data
8.6
11
Not enough data
Training
Feature Not Available
Not enough data
Feature Not Available
Not enough data
7.6
64
Not enough data
Feature Not Available
Not enough data
Feedback
8.0
64
Not enough data
7.7
65
Not enough data
Feature Not Available
Not enough data
7.8
65
Not enough data
8.0
63
Not enough data
7.9
63
Not enough data
Feature Not Available
Not enough data
Generative AI
8.0
54
Not enough data
Agentic AI - Marketing Account Intelligence
8.2
15
Not enough data
8.1
14
Not enough data
8.0
14
Not enough data
7.7
14
Not enough data
Lead Intelligence
8.8
1024
Not enough data
8.8
600
Not enough data
9.0
1074
Not enough data
Lead Management
9.0
1011
Not enough data
8.6
900
Not enough data
9.0
1027
Not enough data
Marketing Campaigns
Feature Not Available
Not enough data
Feature Not Available
Not enough data
Feature Not Available
Not enough data
Feature Not Available
Not enough data
8.9
949
Not enough data
Data Availability - Marketing Account Intelligence
8.3
95
Not enough data
Data Accuracy - Marketing Account Intelligence
8.3
94
Not enough data
Categories
Categories
Shared Categories
Apollo.io and TheirStack are categorized as Lead Mining
Unique Categories
Apollo.io is categorized as Calendar, Account Data Management, Sales Performance Management, Visitor Identification, Email Deliverability, Email Verification, Sales Coaching, AI Meeting Assistants, Lead Intelligence, Transcription, Email Tracking, AI Writing Assistant, Lead-to-Account Matching and Routing, Sales Engagement, Conversation Intelligence, Business Scheduling, Sales Intelligence, Lead Capture, Outbound Call Tracking, AI Sales Assistant, Marketing Account Intelligence, Auto Dialer, Revenue Operations & Intelligence (RO&I), Lead Scoring, Buyer Intent Data Providers, and AI Chatbots
TheirStack is categorized as Market Intelligence
Reviews
Reviewers' Company Size
Apollo.io
Small-Business(50 or fewer emp.)
Mid-Market(51-1000 emp.)
Enterprise(> 1000 emp.)
TheirStack
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
Information Technology and Services
15.2%
Computer Software
13.5%
Marketing and Advertising
12.3%
Staffing and Recruiting
4.6%
Financial Services
4.2%
Other
50.2%
Information Technology and Services
25.0%
Consulting
16.7%
Market Research
16.7%
Computer Software
16.7%
Staffing and Recruiting
8.3%
Other
16.7%
Alternatives
Discussions
What is Apollo IO used for?
23 Comments
AP
Apollo.io is widely used database software. It is used for searching database like companies, contacts, designation, phone numbers, business email addresses....Read more
How do I submit my business to apollo
11 Comments
SS
Same here - I can't submit my company either. Wearitar - https://wearitar.comRead more
TheirStack has no discussions with answers
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