Relevio.ai 2026-09-17

This is the XenForo add-on for Relevio, a unique context‑aware, rule‑driven moderation engine that combines moderation with coordinated / agentic spam detection to enable fully autonomous or semi-autonomous forums and story boards.

With Relevio you can reduce moderation workload dramatically, eliminate your moderators exposure to distressing content and stamp out coordinated / agentic spam.

How does it work?​

Relevio is a new class of moderation engine employing Rule‑Driven Semantic Moderation, which uses the full power of the most advanced large language models (LLM). This is very different from the established method of Category‑Based Classifier Moderation.

Moderation before submission​

Uniquely, Relevio is invoked from the user interface before content ever reaches your server. This means your forum only ever receives quality checked, safe content. Relevio not only reduces your workload in absolute terms, by preventing bad posts from being created in the first place, but it protects your moderation team from being exposed to harmful or distressing content.

By contrast CBCM moderators that work on content after it reaches your server, by automatically flagging it or moving it to your moderation queue. Such systems can actually increase your moderation workload.

Rule‑driven, not category‑driven​

With RDSM you define the rules in plain English. Relevio applies them consistently, using AI only as a semantic interpreter. There is no drift, no unpredictability and no black‑box behaviour. There are no fixed categories and no percentage scores. Each rule either passes or fails.

Context‑aware by design​

Every check includes context (the related story and prior reply chain). Relevio understands where a new post sits in the conversation, so it can enforce relevance and keep threads coherent.

Multimodal coherence​

Relevio checks that images, attachments and text actually belong together, evaluating them as a single semantic unit. This prevents users from pairing misleading images or attachments with unrelated narratives and keeps your platform coherent, trustworthy, and harder to exploit.

Cryptographically verifiable decisions​

Every approved submission is signed with a secure HMAC that binds the content, images, ruleset, and context together with your private key. The XenForo backend only accepts trusted, tamper‑proof posts. It is this trust that allows the moderation to take place in the user interface.

Instant feedback for users​

Relevio presents users with clear, structured explanations and actionable suggestions before they submit. This reduces the irritation and distrust people feel when their content is rejected by a black‑box system. Instead of “your post was blocked,” or "your account has been suspended," users get transparent guidance that helps them fix issues quickly, stay engaged and stay on the right side of your rules.

Multiple rulesets​

Relevio allows you to define multiple rulesets, with different rules for new posts, replies, and across different forums / nodes. This allows you to keep individual forums focussed on particular topics. Rulesets are managed from your relevio.ai account.

Coordinated Spam detection​

Every check optionally includes a coordinated spam assessment, from which the XenForo add-on is able compile statistics and provide you with the tools necessary to detect and dismantle spam rings.

Fast​

Moderation time is 1-2 seconds for straight text with no rule violations, slightly longer for failures and around 10 seconds for multi-modal content (images, etc) depending on complexity.

Fail safe​

The Relevio XenForo add-on has a fail safe design. If the main Relevio service is unavailable or faults, then posts are automatically sent to the normal moderation queue. This ensures that your system is never blocked from receiving new posts.

Internally the Relevio.ai moderation engine uses a redundant architecture, which means it automatically falls back on backup LLMs should our primary LLM fail.

Easy to configure​

All you need is a relevio.ai account. Simply install the add-on, enter your account id and private key in the add-on settings and you are ready to go.

Bypass permission​

Grant user groups permission to bypass Relevio moderation and allow your trusted users, administrators and moderators to post content without constraint.

Auditing and statistics​

Requests to Relevio moderation are fully audited and a range of statistics reports are available for analysing usage, costs, rule failures, etc.

Costs​

30 free moderations every month

The XenForo add-on requires a relevio.ai account and an API private key to function.

For the XenForo add-on, you should use the Relevio API-only pay-as-you go plan. Charging is based on processing units allowing the cost of moderating to scale with the size of post and whether there are images involved.

Processing units are calculated as follows:

• Up to 1000 characters of input text: 1 unit
• Each additional 1000 characters of text: +1 unit
• Each image up to 1024×1024 pixels: +1 unit
• Each attachment: +1 unit

Check our website for current unit pricing

A call to the moderation API is charged whether it returns pass or fail. A minimum of 1 processing unit applies to all calls to the moderation API.

The Pay-as-you go plan currently includes 30 free processing units every month to aid testing and evaluation.

Requirements​

This version has been developped to work on XenForo 2.3.x and XenForo 2.2.x. Minimum version of MySQL 8.0.1

More about coordinated spam detection​

Coordinated spam refers to a pattern where one user posts a question or engineers a post that invites a product recommendation. Then a subsequent user responds with an endorsement, recommendation, or promotion of a product, service, website.

The users act in a coordinated way in order to create authentic sets of posts that are in fact spam. It becomes obvious that two or more users are acting in this way when they start doing this with some frequency and a pattern evolves.

Modern AI agents have allowed the process of posting spam to be completely automated, resulting in a horribly large number of illegitimate posts for administrators to sift through. This is compounded by the agents posting legitimate looking posts and replies around the spam to dilute the spam below detectable thresholds or to elevate the account’s trust score before starting to spam.

Relevio does the hard part of this analysis for you: using context to detect what might or might not be coordinated spam and who might or might not be implicated in the spam, saving you massive amounts of time sifting through records. It then gives you the tools needed to analyse the results, detect patterns and make informed decisions.

Screenshots​

Quality Check Response


Coordinated spam rings


Suspicious posts - coordinated spam