Customer.io vs phpList
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
Customer.io is the stronger AI pick in Email Marketing: it has a visibility score of 6.2 versus 0.9 for phpList.
Choose Customer.io if…
- You want the brand AI engines rank higher (6.2 vs 0.9)
- AI answers describe it more positively (34% vs 0% positive)
- You need GDPR or CCPA or ISO 27001 or SOC 2 Type II or HIPAA coverage
- Strong behavioral and event-driven automation
Choose phpList if…
No clear advantage in the published data.
AI visibility side by side
Latest weekly run · Nov 2
| Metric | Customer.io | phpList |
|---|---|---|
| Visibility score | 6.2% | 0.9% |
| Change vs last week | New | New |
| Rank in Email Marketing | #16 | #34 |
| Share of voice | 1.7% | 0.3% |
| Mentions this run | 10 | 1 |
| Positive in AI answers | 34% | 0% |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
Customer.io 0pp · phpList 0pp over 0 weekly runs.
Engine by engine
Customer.io leads on 2 of 3 engines
Head to head in AI answers
0 engine answers name both brands
Features, pricing & fit
| Dimension | Customer.io | phpList |
|---|---|---|
| Pricing model | Usage-based | — |
| Entry price | $100 / mo | — |
| Free plan | No | — |
| Deployment | Cloud-hosted, with US and EU data centers | Installed on the customer's own server, with a hosted option through phpList.com |
| Compliance | GDPR, CCPA, ISO 27001, SOC 2 Type II, HIPAA | — |
| Support | Email and chat support, Documentation and community support, Dedicated Customer Success Manager on Enterprise | Community documentation and forums on phplist.org, Professional support from experienced consultants and community members |
| Founded | 2012 | — |
| Headquarters | Portland, Oregon, USA | Marston Moretaine, Bedfordshire, UK |
| Employees | 201–500 | — |
| Funding | Series A led by Spectrum Equity | Bootstrapped |
| Best for | Teams getting started with data-driven messaging, and teams scaling across channels with custom workflows. | Community groups, small businesses and startups wanting a lean, low-cost choice, and large organisations that want to keep their data on their own servers |
Plans side by side
Customer.io
phpList
Pricing not available.
Pros and cons
Themes from the AI answers that mention each brand
Customer.io
- Strong behavioral and event-driven automation
- Well suited to product-led SaaS companies
- Supports onboarding, activation and retention messaging
- Frequently shortlisted as a top marketing automation choice
phpList
Profile in progress.
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “Customer.io vs phpList”, https://slateindex.ai/compare/customer-io-vs-phplist, data of Nov 2, 2026. Licence: CC BY 4.0.