Apollo vs Insider One: Complete Comparison (2026)
An in-depth comparison of Apollo and Insider One to help you choose the right tool for your business.
Last updated: November 2026
Apollo
6.5/10
Apollo is a sales intelligence and engagement platform that combines a B2B contact database, email sequencing, a dialer and deal tracking for outbound sales teams.
Insider One
6.5/10
An AI-driven customer engagement platform that combines a CDP, personalization and cross-channel journey orchestration for B2C enterprise and mid-market brands.
Feature-by-Feature Comparison
| Feature | | |
|---|---|---|
| Scores | ||
| Overall Rating | 6.5/10 | 6.5/10 |
| Analytics | 6/10 | 8/10 |
| Cost | 7/10 | 3/10 |
| Customization | 6/10 | 8/10 |
| Ease of Use | 8/10 | 5/10 |
| Integration | 7/10 | 7/10 |
| Scalability | 6/10 | 9/10 |
| Security | 6/10 | 8/10 |
| Support | 4/10 | 7/10 |
| Pricing | ||
| Free plan | Yes | No |
| Cheapest paid plan | $49/user/mo Basic | Contact for pricing |
| Estimated cost for 10 users | Free Free | Contact for pricing |
| Features | ||
| Built-in Calling | Not listed | |
| Collaboration | Not listed | |
| Lead Management | Not listed | |
| Integrations | Not listed | |
| Sales Automation | Not listed | |
| Opportunity Management | Not listed | |
| Contact Management | Not listed | |
| Reporting & Analytics | Not listed | |
| SMS Marketing | Not listed | |
| E-commerce Features | Not listed | |
| Email Marketing | Not listed | |
| Segmentation | Not listed | |
| A/B Testing | Not listed | |
Apollo vs Insider One cost by team size
| Team size | Apollo | Insider One |
|---|---|---|
| 1 user | FreeFree | Contact for pricing |
| 5 users | FreeFree | Contact for pricing |
| 10 users | FreeFree | Contact for pricing |
| 25 users | FreeFree | Contact for pricing |
| 50 users | FreeFree | Contact for pricing |
The plan that fits each team size, billed monthly, before add-ons and usage charges. Each cost opens that tool's pricing calculator for the team size.
Which One Should You Choose?
Why choose Apollo
- Has a free plan (Insider One does not)
- Higher Cost score (7/10 vs 3/10)
- Higher Ease of Use score (8/10 vs 5/10)
- Better fit for sales teams (9/10 vs 2/10)
- Better fit for startups (8/10 vs 2/10)
Why choose Insider One
- Higher Scalability score (9/10 vs 6/10)
- Higher Support score (7/10 vs 4/10)
- Better fit for marketing teams (9/10 vs 4/10)
- Better fit for enterprise (9/10 vs 5/10)
Pros & Cons
Apollo
Pros
- Prospect database, email sequencing, dialer and enrichment come in one subscription, so teams buy fewer tools.
- The free plan has no time limit and lets a team try the full prospecting workflow.
- Reviewers rate ease of use highly, and G2 shows about 4.7 out of 5 from roughly 9,700 reviews.
- Admins can pool credits across the team and set per-user caps.
Cons
- Many reviews report inaccurate data, especially mobile numbers and contacts outside North America.
- Credits expire each cycle, phone reveals cost about eight times as much as an email, and credits are spent even on bad records.
- Support is the lowest-rated G2 subcategory, and Trustpilot shows a TrustScore of about 3.1.
- API access and SSO require the top Custom plan, and every seat must be on the same plan.
Insider One
Pros
- Covers web, email, SMS and RCS, WhatsApp, web push, app and site search from a single CDP-based workspace.
- The email module's A/B/n tests switch traffic to the winning variant automatically, and send-time optimization is included.
- Named a Leader in the 2026 Gartner Magic Quadrant for Personalization Engines, according to the vendor's site.
- The vendor states ISO 27001 certification, a SOC 2 examination and a CSA STAR registry listing.
- The $0 Migration program and an automatic migrator for templates and contacts reduce switching costs.
Cons
- No public pricing, free trial or self-serve evaluation.
- G2 reviewers often mention a steep learning curve for advanced features.
- Implementation is heavy because the platform depends on getting data into its CDP.
- Some reviewers report slow support at peak times.
- The product is built for B2C, and its templates are thinner outside retail and ecommerce.
Not sold on either?
Frequently Asked Questions
Apollo and Insider One both score 6.5/10 on our AI Software criteria. The largest gap is in Cost: 7/10 for Apollo and 3/10 for Insider One.
Apollo has a free plan; Insider One does not list one.
Apollo is the better fit for sales teams: we rate it 9/10 for them, against 2/10 for Insider One.
