TL;DR
- Zoomin’s acquisition by Salesforce has put its standalone products on a path to end-of-renewal, pushing enterprises to find a new content delivery platform.
- This article evaluates five options against six criteria: existing content ecosystem, delivery, search, AI/retrieval readiness, governance, and analytics.
- SearchUnify and Fluid Topics emerge as the strongest full CDPs.
- Document360 fits teams wanting an all-in-one knowledge base.
- Paligo and Heretto are CCMS platforms better paired with a separate delivery layer than used as standalone replacements.
Zoomin has been a good soldier for you on the ground for years. As a content delivery platform, it brought technical content from your existing systems into customer-facing documentation, self-service, and in-product experiences. However, with its acquisition by Salesforce, the scenario is evolving. The standalone Zoomin products you subscribed to have seen a shift in direction, with the product portfolio now moving to end-of-renewals status.
A tradeoff of evolution is also unpredictability. Enterprises tying a key facet of their business to a platform in transition may have to keep looking at what’s in and what’s out more often than they would want. You were pointed to Unified Knowledge some time back, but that too is scheduled for change in the Summer ’27 release.
If all of that sets you on a path to add stability, you might be able to solve a bigger enterprise use case than what you started with. With AI maturely built in, a modern content delivery platform can turn the content you already maintain into a governed knowledge layer for search, self-service, in-product help, and AI-assisted experiences, across systems — without requiring you to rebuild your existing content ecosystem.
If you are evaluating alternatives to Zoomin, the right replacement depends on what your documentation environment already looks like and what you need your content to do next. A technical documentation team with a large DITA investment has different requirements from a team looking for a straightforward knowledge base.
Here are five options worth evaluating.
Table of Contents
- What to evaluate in a modern content delivery platform
- The 5 Best Content Delivery Platforms
- Which One Should You Actually Choose?
What to evaluate in a modern content delivery platform
Before comparing vendors, evaluate them against the parts of the content delivery stack that matter to your organization:
Existing content ecosystem: Can the platform connect to your CCMS, CRM, ITSM, community, and other content sources without forcing a rebuild of your existing content infrastructure?
Delivery options: Can the same content power portals, in-product experiences, embedded help, conversational interfaces, and API-based experiences?
Search quality: Does it support keyword and semantic search, while accounting for permissions, content versions, metadata, and context?
Retrieval relevance: Does it consistently identify and rank the most relevant content for a query, including the right passages or sources for AI-generated responses?
AI readiness: Can AI assistants and agents retrieve trusted, permission-aware content from the same underlying knowledge layer rather than relying on a separate, disconnected knowledge base?
Governance: Can you manage access, content versions, source-level permissions, and auditability consistently across different content experiences?
Content analytics: Can you understand what users search for, where they encounter content gaps, and which content contributes to successful self-service?
The right CDP should not just publish content. It should connect your content ecosystem, retrieve the right knowledge, and deliver it wherever customers need it.
The 5 Best Content Delivery Platforms
In this blog we compare 5 Content Delivery Platforms. While all of these enable teams to publish and manage technical documentation, they serve distinct architectural roles across the content lifecycle. Moreover, Modern Content Delivery Platforms (CDPs) focus on aggregating diverse content sources into a unified, intelligent retrieval layer for multi-channel discovery and AI-assisted experiences.
In contrast, Component Content Management Systems (CCMS) specialize in structured authoring and component reuse upstream, whereas cloud knowledge bases prioritize all-in-one authoring and basic self-service publishing.
SearchUnify
SearchUnify Content Delivery Platform is built to work with an organization’s existing content ecosystem and extend it into unified search, self-service, and AI-assisted experiences. Its key advantage is flexibility: teams can start with a documentation portal replacement, retain their existing authoring and content systems, and expand into broader self-service and conversational experiences as their requirements evolve.
Existing content ecosystem: SearchUnify connects to CCMS platforms including MadCap, RoboHelp, Paligo, IXIASOFT, Heretto, and oXygen, as well as DITA, HTML5, PDF, and Markdown. It can also ingest content from Salesforce, ServiceNow, Zendesk, Confluence, SharePoint, GitHub, S3, and other sources. Content is normalized into a common schema and synchronized near real time. A native Zoomin connector can also support migration from existing Zoomin-hosted documentation, allowing teams to transition content without having to rebuild their entire content ecosystem at once.
Delivery: Teams can publish branded, white-label documentation portals with multi-product and multi-version support, multiple custom domains, in-product help, embedded experiences, and APIs. A no-code portal designer provides control over the presentation layer, while the same underlying content can support different customer-facing experiences.
Search and retrieval: SearchUnify combines full-text and semantic vector search with hybrid ranking, faceted filters, autocomplete, spell correction, and synonym expansion. Search can account for permissions and content versions. Its federated retrieval layer can also bring relevant context from multiple sources into a single search or AI experience, reducing the need for users to know which repository contains the answer.
AI flexibility: SearchUnify’s conversational AI capabilities use federated RAG to ground responses in retrieved customer content rather than relying on the LLM alone. It also supports a bring-your-own-LLM approach. Built-in guardrails, audit trails, and permission-aware retrieval provide additional controls for governed AI use.
Self-service expansion: SearchUnify can extend beyond documentation into broader self-service, including community, CRM, support, training, and other knowledge sources. A conversational AI solution can support use cases such as case deflection, agent handoff, and interactions with systems such as Salesforce and Zendesk. This allows organizations to begin with a documentation replacement and expand toward a federated self-service experience without introducing a separate retrieval layer for each channel.
Governance and analytics: Role-based access control, SSO with MFA, encryption, audit logs, data residency, and BYOK options support governed deployments. Analytics cover search behavior, content performance, article feedback, and zero-result or dead-end searches, helping teams identify both content performance and knowledge gaps.
Scalability and commercial flexibility: The platform is designed to scale incrementally as storage, indexed content, search volume, and administrative requirements grow. Additional capacity can be added as needed rather than requiring the organization to define its eventual content and usage footprint upfront. This modular approach can be useful for teams that want to start with a defined migration scope and expand the platform over time.
Why it ranks first: For teams replacing Zoomin while preserving their existing content ecosystem, SearchUnify offers a broad path from migration to modern content delivery and self-service. It can meet immediate documentation needs while providing the retrieval, AI, and federated search foundation for a broader customer experience. The native Zoomin connector provides a practical migration bridge, while BYOL, modular expansion, and support for existing authoring systems give teams flexibility over how quickly and how far they evolve their stack.
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Fluid Topics
Fluid Topics positions itself as a Product Knowledge Platform and provides many of the capabilities you would expect from a dedicated content delivery platform.
Existing Content ecosystem: It can ingest content from CCMS platforms, LMSs, SharePoint, Git, wikis, Word documents, and PDFs, with strong native DITA support.
AI Strength: Its search combines keyword and AI-driven semantic capabilities, while its delivery layer supports multi-brand knowledge bases and personalized experiences. It also offers a RAG-powered chatbot, a production-ready MCP server for AI agents, granular rights management, and analytics covering content engagement and case deflection.
Governance and Security: Fluid Topics also places significant emphasis on security and compliance, making it a strong option for organizations operating in regulated sectors such as financial services, life sciences, and pharma.
Limitation: The trade-off is complexity. Reviews note a learning curve when teams adopt its more advanced capabilities, and the quality of the source content has a significant effect on the resulting experience.
Best fit: Teams looking for a dedicated CDP with strong DITA support, AI capabilities, personalization, and governance should put Fluid Topics high on the shortlist.
Document360
Document360 is a cloud-based knowledge base and knowledge management platform that has been serving organizations since 2017. It is particularly relevant for teams that want to create and manage documentation directly within a relatively straightforward knowledge-base environment.
AI Strength: Its capabilities include the Eddy AI suite for content generation, automated translation across more than 50 languages, FAQ automation, version control, role-based access, and multi-workspace support.
Existing content ecosystem: It also integrates with help desk platforms including Zendesk, Intercom, and Freshdesk.
Limitation (as a Content Delivery Platform): The main limitation as a CDP appears when you compare it with the needs of large technical documentation environments. Document360 uses a single-tenant architecture and does not provide native multi-client portals. It is also primarily built around authoring content directly within the platform rather than deeply ingesting an existing enterprise CCMS or DITA environment.
Best fit: Teams looking for a cloud knowledge base with built-in authoring and AI features may find Document360 a good fit. Organizations with extensive structured-authoring investments should evaluate its ingestion and architecture carefully.
Paligo
Paligo belongs to a different category from Zoomin and dedicated CDPs. It is a Component Content Management System (CCMS) built for structured content authoring rather than a standalone content delivery layer.
Its strengths are on the authoring side: structured XML-based content, content reuse, version control, browser-based authoring, and translation management. For documentation teams managing reusable technical content, these capabilities can be valuable.
The distinction matters when building a Zoomin replacement. Paligo itself describes connections from its CCMS to content delivery platforms such as SearchUnify and Zoomin. That relationship makes the architecture clear: Paligo manages the content upstream, while a CDP can handle how that content is delivered and discovered.
Limitation (as a content delivery platform): The limitation is therefore fundamental to the category. Paligo does not provide the same dedicated customer-facing delivery layer as a CDP, so teams may need another platform for portal delivery, broader content discovery, and other downstream experiences.
Best fit: Teams that need a structured CCMS and are comfortable pairing authoring with a separate delivery platform.
Heretto
Heretto is also primarily a CCMS, with a focus on DITA-compliant structured content and technical authors working with large documentation environments.
It offers headless and API-based publishing, often described as content-as-a-service, which gives it more delivery-layer capability than a conventional authoring-only system.
For organizations invested in structured technical documentation, Heretto provides an authoring and content-operations environment with DITA at its core. Its headless approach can also make content available to other applications and experiences.
The category distinction still matters. Heretto’s delivery capabilities are narrower than those of a dedicated CDP when you need a full combination of customer-facing portals, personalization, broad search, and AI grounding.
There is also no requirement to choose between Heretto and SearchUnify. SearchUnify can connect to Heretto as a content source, allowing Heretto to remain part of an existing authoring stack while SearchUnify handles content delivery.
Best fit: Organizations with substantial DITA and structured-authoring requirements that want API-based publishing, or teams that want to pair Heretto with a dedicated CDP.
| Vendor | Content ecosystem & integrations | Multi-channel delivery | Search & discoverability | AI & RAG readiness | Governance & access control | Content & search analytics |
| SearchUnify | Strong | Strong | Strong | Strong | Strong | Strong |
| Fluid Topics | Strong | Strong | Strong | Strong | Strong | Partial |
| Document360 | Partial | Partial | Strong | Strong | Strong | Partial |
| Paligo | Strong, CCMS-focused | Partial | Partial | Partial | Strong | Partial |
| Heretto | Strong, CCMS-focused | Strong, headless/API | Partial | Partial | Strong | Partial |
The table highlights an important distinction: not every product listed here solves the same layer of the content stack. SearchUnify and Fluid Topics are dedicated CDPs. Document360 is primarily a knowledge-base platform, while Paligo and Heretto are CCMS products with varying delivery capabilities.
Which One Should You Actually Choose?
Start with your existing content architecture rather than the vendor feature list.
If you need a dedicated CDP that can ingest multiple existing sources, deliver content across portals and in-product experiences, support permission-aware search, ground AI experiences, and provide governance and analytics, SearchUnify is the strongest overall fit. Fluid Topics is the closest alternative, particularly for teams with substantial DITA requirements and a strong focus on personalization.
If your requirements are centered on creating and managing a knowledge base directly within the platform, Document360 may be more appropriate. If structured authoring is the primary requirement, Paligo or Heretto deserve consideration, with the understanding that you may still need a separate delivery layer.
Ready for a smarter alternative to Zoomin?
Talk to our specialists to see how SearchUnify’s content delivery architecture fits your unique tech stack and support goals.
Suggested Read: If Zoomin transition is driving your evaluation, see [link: Zoomin migration guide] for the deeper migration considerations.
FAQ
Q What replaces Zoomin?
There is no single replacement that fits every organization. Salesforce’s current path for Salesforce Unified Knowledge points toward Salesforce Enterprise Knowledge, powered by Data 360. For teams looking for a standalone, vendor-neutral content delivery platform, alternatives include dedicated CDPs such as SearchUnify and Fluid Topics, depending on the organization’s content architecture and requirements.
Q Do Zoomin alternatives require a CCMS migration?
No. A replacement CDP does not necessarily require you to replace your existing CCMS. For example, SearchUnify can ingest content from CCMS platforms including Paligo, Heretto, MadCap, RoboHelp, IXIASOFT, and oXygen. It can also index content from Zoomin through its native Zoomin connector. This allows the delivery layer to change while your existing authoring environment remains in place.
Q What’s the difference between a CCMS and a Content Delivery Platform?
A CCMS manages the creation, reuse, structure, versioning, and maintenance of content components. Paligo and Heretto are examples of CCMS platforms.
A Content Delivery Platform focuses on how that content reaches its audience. This can include portals, search, in-product help, embedded experiences, APIs, conversational AI, permissions, and analytics.
The two can work together. A team can retain a CCMS such as Heretto or Paligo for authoring while using a CDP such as SearchUnify or Fluid Topics to deliver that content across customer and support experiences.
