Best for
Best for teams that want email marketing with deep marketing automation and a built-in CRM, and that will grow into advanced segmentation and predictive sending.
- Small and mid-sized
- Enterprise
Email Marketing Comparison
At a glance
Best for
Best for teams that want email marketing with deep marketing automation and a built-in CRM, and that will grow into advanced segmentation and predictive sending.
Best for
Best for enterprise marketing teams that want email, web and app personalization driven by one customer profile.
Cataleo does not name a winner. Both statements come from the vendors themselves.
| Criterion | ActiveCampaign | Insider One |
|---|---|---|
| Starting price | From $15 / month Starter plan, billed annually, for 1,000 email contacts and 1 user. The price rises with the number of contacts. | Price on request Insider One publishes no price list and no plan names. The commercial terms are set in a sales conversation after a demo. |
| Free trial | 14-day free trial, no credit card required | Not stated |
| API | Yes, an API with webhooks, plus more than 1,000 integrations | Yes, an open API with webhooks and SDKs alongside more than 100 out-of-the-box integrations in the Integration Hub |
| Hosting | Cloud (SaaS) | Cloud (SaaS), stored in regional instances to meet data residency requirements |
| Campaign types | Yes, email campaigns with a drag-and-drop designer and more than 250 templates | Yes, nine channels: email, SMS and RCS, WhatsApp, web push, web, app, site search, product discovery stories and conversational messaging |
| Automation and journeys | Yes, marketing automation, 5 actions per automation on Starter and unlimited on Plus, Pro and Enterprise | Yes, a drag-and-drop journey canvas with real-time events and triggers, more than 100 ready-made journey templates, next best channel and send-time optimization |
| Segmentation and personalisation | Yes, segmentation from limited on Starter to advanced and premium on the higher plans, with predictive sending | Yes, more than 120 segments, dynamic, behavioural and predictive, including likelihood to purchase, churn risk, lifetime value and discount affinity, with profiles for anonymous visitors |
| Templates and editor | Yes, a drag-and-drop email designer for plain text and HTML with more than 250 pre-built templates | Yes, a drag-and-drop email builder with a code view and real-time preview, AI-generated subject lines and content, one-click localization, and elements such as forms, countdowns and carousels that resolve on open |
| Deliverability and testing | Yes, a spam check across plans and predictive sending | Yes, spam testing, previews across more than 100 devices, automated IP warm-up and regional sending infrastructure |
| Ecommerce and CRM data | Yes, contact profiles with custom fields, tags and lists, plus premium CRM integrations such as Salesforce on the higher plans | Yes, a built-in customer data platform fed by CRM, analytics, ecommerce, data warehouse and point-of-sale sources, with identity resolution across devices |
| Integrations and API | Yes, an API with webhooks plus more than 1,000 integrations | Yes, an open API with webhooks and SDKs plus more than 100 out-of-the-box integrations |
| AI features | Yes | Yes |
| Deployment | Cloud (SaaS), Browser-based | Cloud (SaaS), Browser-based |
| Support | Email helpdesk, Chat, Community forum | Not stated |
| Onboarding | more entries Documentation and knowledge base, Video tutorials, Guided onboarding, Live online demos and webinars | Personal consulting |
| Company size | more entries Small and mid-sized, Enterprise | Enterprise |
| Integrations | Shopify, Salesforce, Zendesk, Wix, Facebook, Google Sheets, Google Ads, ChatGPT, Claude | Salesforce, HubSpot, Microsoft Dynamics, Google Analytics, Amplitude, Google BigQuery, Amazon S3, Shopify, Snowflake |
Adds a column to the table, from the tools in this category.
Row where the values differ The small markers point at the lower number, the longer list or the stated feature. They describe the data, they are not a verdict.
The short version
Every line is one datapoint from the table above, picked automatically. Nothing here is written text.
The trade-offs
ActiveCampaign
Strengths
Limitations
Insider One
Strengths
Limitations
Plans
ActiveCampaign
Insider One
Price on Request
Visit siteWhat users say
ActiveCampaign
No reviews yet. Nothing has been published here yet, and no score is shown. How a review is checked before it appears is described below.
Insider One
No reviews yet. Nothing has been published here yet, and no score is shown. How a review is checked before it appears is described below.
Before sending, the author has to confirm three things: that they have used the product themselves, that they work neither for the vendor nor for a competitor, and that nobody is paying them for the review. We also ask whether the vendor invited them to write it. That answer is required, either answer is accepted, and it stays with the review.
Every review is read by a person before it appears. An email address is required and is confirmed: we send a link to it, and a review does not reach us until the author opens that link, so a review has a sender who was reachable at least once rather than being anonymous. Where what somebody writes needs backing, we ask them for evidence that they used the product, and a review that does not get it is not published. We publish positive and negative reviews alike, we pay nothing and offer nothing for a review, and we accept none that was bought or incentivised.
What we cannot do is verify a purchase. There is no shop here and no account, so whether the author really used the tool rests on their own declaration, on whatever we ask them for, and on the plausibility of what they write. We say so rather than implying a check that does not exist.
A vendor cannot buy a review, and cannot have one removed or changed because they dislike it. We remove or edit a review only if it breaks our rules or the law, for example a false statement of fact. Paid placement has no effect on which reviews appear or on any score.
Where this comes from
ActiveCampaign https://www.activecampaign.com · checked against the official source on 2026-08-19
Insider One https://insiderone.com · checked against the official source on 2026-09-18
This table lists factual criteria taken from information the vendors publish themselves. For how we put it together, see the methodology.