Short answer: Ninetailed no longer exists as an independent product. Contentful acquired the Berlin-based company in August 2024 and folded it into the Contentful web app, where it now ships as Contentful Personalization (still referenced as "Ninetailed by Contentful" in some docs). It is a capable, AI-assisted content personalization and A/B testing layer for teams already modeling content in Contentful. Abmatic AI solves a different, earlier problem: identifying which companies and individual people are already on your website right now, on any CMS or stack, then personalizing the site itself and triggering outbound and advertising from that same signal. Contentful itself is also mid-acquisition: Salesforce signed a definitive agreement on June 1, 2026 to buy Contentful, a deal still pending regulatory approval and expected to close in Salesforce's fiscal Q3 2027, so Contentful Personalization is on track to become a Salesforce-owned product, not a stable independent asset. The full comparison, including where Contentful Personalization genuinely fits, is below.
Disclosure: Abmatic AI publishes this comparison and has a financial interest in you choosing it. We have done our best to represent Ninetailed (Contentful Personalization) fairly using Contentful's public product pages and documented feature set as of July 2026. Verify current plan details directly with Contentful before you buy.
What Ninetailed (Contentful Personalization) Is
Before its acquisition, Ninetailed's pitch was genuinely different from most personalization tools: an API-first, framework-agnostic SDK that could sit in front of any headless CMS, not just Contentful, letting engineering teams wire up audiences, experiences, and A/B/n tests at the component level. Contentful signed a definitive agreement to acquire Ninetailed in August 2024, and that CMS-agnostic positioning is largely gone. The product now runs embedded directly inside the Contentful web app under an Optimization tab, sold as Contentful Personalization, with real AI-assisted features: Audience Suggestions, Experience Suggestions, Variant Generation, and a multi-armed-bandit traffic distributor that shifts traffic toward winning variants automatically.
Component-level A/A, A/B, and A/B/n testing runs inside the same no-code workflow marketers already use to manage Contentful entries, and connectors to tools like Segment, SAP Emarsys, Klaviyo, and Shopify extend audience data beyond the CMS itself. Contentful sells Personalization as a paid add-on on its top-tier plan, currently branded Premium (formerly called Enterprise), in three quote-based tiers, Start, Core, and Scale, with no published list pricing. The Start tier includes a set number of AI Suggestions, unlimited A/B test and experience creation, and audience segmentation based on multiple data points; Core and Scale add richer insights, more AI features, and additional data connections.
Ninetailed (Contentful Personalization) is a well-built tool for what it does now: personalizing and testing content blocks once a team already knows which audience segment a visitor belongs to, via cookies, CDP data, or manual rules, inside Contentful's own content model. What it does not do, and was never built to do, is identify which specific company or named individual is behind an anonymous website visit in the first place, or activate outbound sequencing and advertising off that identity.
What Abmatic AI Is
Abmatic AI is the most comprehensive AI-native revenue platform on the market. It collapses 8 to 12 point tools that mid-market and enterprise B2B teams currently buy separately (VWO, Clay, Apollo, RB2B, Vector, Unify, Qualified (Salesforce), Chili Piper, BuiltWith, and a DSP buying tool) into one platform with a shared identity graph and a shared signal layer.
Where Contentful Personalization renders a different content variant for an audience segment you already defined, Abmatic AI answers the question that comes before that: who is on our website right now, known or anonymous, at the company and individual level, and what should happen because of it. The platform identifies both the companies and the individual contacts behind anonymous website traffic natively, with first-party signal capture across web, LinkedIn, ads, and email, no third-party identification partner required, and no dependency on a specific CMS's content model. From that same signal, it personalizes the website itself on any stack, launches signal-adaptive outbound sequences, runs Google DSP, LinkedIn Ads, and Meta Ads, and books qualified meetings directly to the right AE's calendar.
Abmatic AI is built for mid-market and enterprise B2B teams, typically a marketing or RevOps group of 3 to 25+ people at companies with 200 to 10,000+ employees, running target-account lists from 50 to 50,000+ accounts. Time-to-value is days, not months: the pixel goes live and first-party signal capture starts the same day it is installed. Pricing starts at $36,000 per year, with enterprise tiers available. See the full platform with a demo of Abmatic AI.
Key Differences: Ninetailed vs Abmatic AI
CMS Dependency
Contentful Personalization's original selling point, personalization for any headless CMS, is no longer its actual go-to-market. It is now sold, documented, and onboarded as a Contentful feature, so teams on Sanity, Storyblok, WordPress, a custom stack, or no CMS at all are not the target buyer. Abmatic AI personalizes any website through a visual editor and JSON API, independent of which CMS, or whether a CMS, sits underneath the site.
What Triggers the Personalization
Contentful Personalization renders different content once a visitor already matches an audience segment, typically defined from cookies, a CDP, or manual rules. Abmatic AI's web personalization triggers off its own identity graph, which resolves the account and the individual visitor first, so the personalization decision does not depend on a pre-existing segment or a login state.
Identification Depth
Contentful Personalization does not identify which company or which named individual is behind an anonymous visit; that step happens upstream, if at all, through whatever CDP or analytics tool feeds it audience data. Abmatic AI's account-level deanonymization and contact-level deanonymization both run natively, identifying the individual visitor and the company simultaneously, closing the exact gap RB2B, Vector, and Warmly-class tools also target, with no separate integration to maintain.
What Happens After Personalization
Personalizing a content component inside a CMS is the middle of the funnel, not the whole funnel. Contentful Personalization does not trigger an outbound sequence off an account hitting a high-intent page, run a retargeting ad, or route a qualified visitor to a live chat agent that already knows the account. Abmatic AI's Agentic Outbound, Agentic Chat, and native advertising activation all run off the same identity graph that drives the personalization, so identification, personalization, and activation are one motion instead of three separate tools to stitch together.
Ninetailed vs Abmatic AI: Head-to-Head Comparison
| Capability | Abmatic AI | Ninetailed (Contentful Personalization) |
|---|---|---|
| Works independent of a specific CMS | Yes, any site or stack | No, Contentful-native since the acquisition |
| Component-level content personalization | Yes, visual editor plus JSON API | Yes, core product, inside the Contentful content model |
| A/B and multivariate testing | Yes, shared with personalization, across web, email, and ads | Yes, A/A/B/n at the component level, with a multi-armed-bandit traffic distributor |
| Account-level deanonymization | Yes, native | No |
| Contact-level deanonymization | Yes, native, no add-on | No |
| Account and contact list building (Clay / Apollo-class) | Yes, first-party DB with firmographic and technographic filters | No |
| Banner pop-ups / on-site CTAs | Yes, signal-gated | Limited, component-based inside Contentful entries |
| Agentic Outbound (Unify / 11x / AiSDR-class) | Yes, signal-adaptive, individual and account level | No |
| Agentic Chat / inbound (Qualified (Salesforce)-class) | Yes, account and contact aware | No |
| AI SDR meeting routing and booking (Chili Piper-class) | Yes, native | No |
| Technology / tech-stack scraper (BuiltWith-class) | Yes, native | No |
| Advertising (Google DSP, LinkedIn Ads, Meta Ads, retargeting) | Yes, native, account-list driven | No |
| First-party and third-party intent | Yes, unified signal layer, individual and account level | No, relies on connected CDPs (Segment) or analytics for audience data |
| Salesforce / HubSpot integration | Yes, both bi-directional | Via connectors, not native bi-directional CRM sync |
| Built-in analytics / RevOps reporting | Yes, native, pipeline and attribution | Experience and Component Insights, content-testing scope only |
| Published self-serve pricing | No, sales-assisted | No, paid add-on on Contentful's top-tier Premium plan, quote-based (Start / Core / Scale) |
Sixteen rows, and Abmatic AI covers twelve-plus of the capability dimensions natively; Ninetailed (Contentful Personalization) covers its home turf of content personalization and testing well and stops there. Abmatic AI wins everything upstream of a content variant, who is on the site and what account they belong to, and everything downstream of it, what sequence fires and what ad runs next.
Skip the manual work
Abmatic AI runs targets, sequences, ads, meetings, and attribution autonomously. One platform replaces 9 tools.
See the demo →Where Ninetailed Wins
To be fair to Contentful Personalization, it has real strengths in its lane:
- Native fit for a Contentful-committed team. Audience Suggestions, Experience Suggestions, Variant Generation, and a multi-armed-bandit traffic distributor run inside the same no-code workflow marketers already use to manage Contentful entries, with no separate tool to learn.
- Mature component-level A/B/n testing. The A/A, A/B, and A/B/n testing engine, inherited from the original Ninetailed product, is a genuine strength for teams that want to test content variants precisely at the component level rather than the full-page level.
Neither strength closes the gap on identifying who an anonymous visitor is or activating outbound and ads off that identity. For teams evaluating other tools in the same category, our full Ninetailed alternatives guide covers Dynamic Yield, Uniform, Optimizely, and Adobe Target in more depth if a CMS-agnostic content-testing swap, rather than an identity-first platform, is what you need. This gap matters most when the visitor is a named target account rather than an anonymous drive-by; our what is account-based marketing guide and our best tools for account-based marketing roundup cover how identification and personalization fit into a broader ABM program.
Why Teams Choose Abmatic AI Instead
Abmatic AI is the most comprehensive AI-native revenue platform on the market. It starts one step earlier than Contentful Personalization: instead of rendering a variant for an audience segment you already defined, it identifies the specific company and person behind an anonymous visit first, then personalizes, tests, sequences, and advertises off that identity, on any CMS or no CMS at all.
- Contact-level deanonymization, natively, no add-on: identifies the individual person browsing your website anonymously, a depth Contentful Personalization does not reach since it personalizes for a segment, not a resolved person.
- Account-level deanonymization: identifies the companies visiting your site in real time, feeding the same identity graph as the individual-level signal, before any personalization rule ever runs.
- Web personalization: a visual editor and JSON API to personalize landing pages and on-site experiences by firmographic, account stage, or intent signal, on any stack, not gated to a single CMS content model the way Contentful Personalization now is.
- A/B testing (VWO-class): multivariate testing across web, email, and ads, sharing the same personalization layer and identity graph, instead of a testing subscription that only covers Contentful-modeled content.
- Agentic Outbound (Unify / 11x / AiSDR-class): signal-adaptive sequences that trigger the moment an identified account crosses an intent threshold, a step Contentful Personalization has no equivalent for.
- Agentic Chat (Qualified (Salesforce)-class): live-site conversational AI that already knows the account and the contact, engaging a visitor in real time rather than waiting for them to self-identify into a segment.
- AI SDR meeting routing and booking (Chili Piper-class): inbound and outbound qualified meetings auto-routed to the right AE's calendar, natively, no separate scheduling tool bolted on.
- Native advertising activation: Google DSP, LinkedIn Ads, and Meta Ads, driven off the same account list and intent signal, alongside a technology scraper (BuiltWith-class) feeding prospect tech-stack data into the same targeting layer, channels Contentful Personalization does not touch.
Deep integrations: bi-directional sync with Salesforce (accounts, contacts, opportunities, custom objects, campaigns) and HubSpot (companies, contacts, deals, lists, workflows, campaigns), native Google Ads, LinkedIn Ads, and Meta Ads connections, Slack alerts and AE routing, Gmail and Outlook for sequence sends and meeting booking, and warehouse exports to Snowflake, BigQuery, and Redshift.
See these capabilities on your own traffic with a walkthrough of the full platform.
Pricing Comparison: Ninetailed vs Abmatic AI
| Item | Abmatic AI | Ninetailed (Contentful Personalization) |
|---|---|---|
| Starting price | $36,000 per year, enterprise tiers available | No published list price, quote-based add-on |
| Packaging | Full platform, one price band | Paid add-on to Contentful's top-tier Premium plan, three tiers: Start, Core, Scale |
| Entry tier scope | Full platform: identification, personalization, testing, outbound, chat, advertising, AI RevOps | Content personalization and A/B/n testing inside Contentful, plus a set number of AI Suggestions |
| Billing model | Annual contract, sales-assisted | Quote-based, tied to an existing or new contract on Contentful's top-tier Premium plan |
| Website visitor identification included? | Yes, native, both account and contact level | No, relies on connected CDP or analytics tools for audience data |
| Advertising activation included? | Yes, native | No |
| Requires a specific CMS? | No, works on any site or stack | Yes, requires Contentful |
Ninetailed (Contentful Personalization) and Abmatic AI are not pricing alternatives to each other; they solve different-sized problems, and a Contentful subscription is a prerequisite for one of them. Abmatic AI's $36,000-a-year starting price reflects a platform that identifies the visitor, builds the personalization and the outbound sequence from that identity, and runs the ad, all without requiring any particular CMS underneath the site. Verify current Contentful Personalization packaging and tier limits directly with Contentful, since it has changed more than once since the acquisition closed. See what the full platform costs on your own traffic with a demo.
Which Should You Choose in 2026?
- Best for a team fully committed to Contentful that only needs content-block testing: Contentful Personalization. Its AI Suggestions, Variant Generation, and multi-armed-bandit distributor are purpose-built for teams already modeling content there.
- Best for mid-market B2B teams: Abmatic AI, with identification, personalization, and activation running on the same signal layer from day one.
- Best for enterprise B2B teams: Abmatic AI, handling tier-1 (1:1), tier-2 (1:few), and broad-based (1:many) programs from 50 to 50,000+ target accounts.
- Best for identifying anonymous website visitors at the individual level: Abmatic AI. Contentful Personalization has no equivalent identification layer of its own.
- Best for teams on a CMS other than Contentful, or no CMS at all: Abmatic AI, since Contentful Personalization is no longer sold or supported as a CMS-agnostic tool.
- Best for native agentic AI across chat, outbound, and workflows: Abmatic AI.
Some teams keep both: Contentful stays as the content platform, with Contentful Personalization handling component-level testing for known audience segments, while Abmatic AI handles the earlier, always-on job of identifying who is on the site and personalizing, sequencing, and advertising off that identity. If your core problem is testing content variants inside a Contentful content model you already run, Contentful Personalization remains a real, focused option. If the core problem is that you do not know who is already on your website right now, at the company or the individual level, that was never a problem Ninetailed, before or after the acquisition, was built to solve, and Abmatic AI was.
Ready to see the difference on your own traffic? Book a demo of Abmatic AI.
Frequently Asked Questions
Is Ninetailed still a standalone product?
No. Contentful signed a definitive agreement to acquire Ninetailed in August 2024, and the product now ships as Contentful Personalization, embedded in the Contentful web app under an Optimization tab. Some documentation and third-party integrations still reference it as "Ninetailed by Contentful," but there is no independent Ninetailed product to buy separately. Contentful itself is now being acquired as well: Salesforce signed a definitive agreement on June 1, 2026 to buy Contentful, a deal not yet closed as of this writing, so Contentful Personalization's ownership is set to change again pending regulatory approval.
Can Ninetailed (Contentful Personalization) identify anonymous website visitors?
No, not on its own. Contentful Personalization renders content for an audience segment defined by cookies, a CDP, or manual rules; it does not identify which specific company or named individual is behind an anonymous site visit. Abmatic AI's account-level deanonymization and contact-level deanonymization are both native, identifying the company and the individual visitor simultaneously with no third-party integration required.
Does Abmatic AI replace Ninetailed's A/B testing?
Abmatic AI includes A/B and multivariate testing (VWO-class) across web, email, and ads, sharing the same identity graph that drives personalization. Contentful Personalization's A/A, A/B, and A/B/n testing, inherited from the original Ninetailed product, is a genuine strength for component-level testing inside a Contentful content model specifically. The difference is scope: Abmatic AI's testing works on any site, not just Contentful-modeled pages, and connects directly to identification and activation.
Can I use Contentful Personalization and Abmatic AI together?
Yes. Some teams keep Contentful, and Contentful Personalization, as the content platform and testing layer for known audience segments, while running Abmatic AI as the platform that identifies who is on the site at the account and individual level, personalizes the experience, and triggers outbound and advertising from that signal.
How does Ninetailed (Contentful Personalization) pricing compare to Abmatic AI pricing?
Contentful sells Personalization as a paid add-on on its top-tier plan, currently branded Premium (formerly called Enterprise), in three quote-based tiers, Start, Core, and Scale, with no published list price. Abmatic AI starts at $36,000 per year with enterprise tiers available, reflecting a full platform (identification, personalization, testing, outbound, chat, and advertising) rather than a content-testing add-on tied to a separate Contentful contract. Verify current Contentful Personalization pricing directly, since packaging has changed since the 2024 acquisition.
What is the main difference between Ninetailed and Abmatic AI?
Ninetailed, now Contentful Personalization, renders a different content variant for an audience segment you already defined, inside the Contentful content model. Abmatic AI identifies the specific company and individual behind an anonymous visit first, natively, then personalizes the site on any stack, triggers outbound, and runs ads off that identity. One makes a content block smarter for a known segment; the other decides who the segment is in the first place.
Is Ninetailed (Contentful Personalization) a good fit for enterprise B2B teams not on Contentful?
Not directly. Contentful Personalization requires a contract on Contentful's top-tier Premium plan, so teams on Sanity, Storyblok, WordPress, a custom stack, or no CMS at all are not its target buyer post-acquisition. Enterprise and mid-market B2B teams that need identification, personalization, and activation independent of a specific CMS are better served by a CMS-agnostic platform. See our broader Ninetailed alternatives guide for other options in this category.
