# 3RD vs Serpier

How 3RD and Serpier differ in how they track AI answers, plan the work and get it published. Prices, limits and when each tool is the better pick.

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Comparison

3RD vs Serpier: buy placements, or find out why AI picks a competitor.

find out why

Serpier combines SEO rank tracking, AI visibility and a media network where you buy publications, with an agent that publishes once you approve. 3RD is built for marketing teams: it checks AI answers daily, finds out why competitors get chosen and plans the work. 3RD drafts the fixes in your brand voice; your team approves and publishes.

Built by former Googlers and veterans of brands and agencies.

Quick answer · updated October 31, 2026

Serpier or 3RD: which fits your team?

Serpier suits teams that buy links and track Google rankings. 3RD suits marketing teams wanting daily AI answers, why competitors win, and a plan. Both come from Denmark. Serpier, from Aarhus, pairs AI tracking with a media network of 200,000+ sites and its agent, Navi. 3RD (get3rd.com) scores five drivers per market, builds a Playbook toward your goal and drafts the fixes for your team to approve.

Monitor

Ask AI models the questions your buyers ask, in every market and language you choose. Answers come through each provider's API; for ChatGPT, 3RD can also capture answers from the consumer app.

Diagnose

Score the five drivers AI uses to choose a brand (content coverage, content quality, agent readiness, authority and outreach) for every market.

Plan

Set a goal and get a Playbook: the ranked work to reach it, checked daily against the latest AI answers. Estimated impact is kept apart from measured change.

Act

3RD drafts the fixes in your brand voice; your team approves and publishes. Outreach comes as briefs for your PR team.

How 3RD works

Diagnose, plan, then draft, per market

Choose Serpier if…

You buy publications or links today and want to order them from the same tool as your AI tracking. You want Google, Yahoo or Baidu rank tracking next to AI visibility. You want an agent that publishes approved changes straight to WordPress, Shopify, Magento or Umbraco. You need many prompts or seats on a starter budget, or a free plan.

Choose 3RD if…

You want AI answers checked every day from the entry plan, not weekly. You want to know why AI picks a competitor, broken into five drivers, before deciding what to do. You want one plan toward a goal, with content, technical, outreach and ads tasks. You want drafts in your brand voice that land in your CMS as drafts. You want to try it with no card.

Decide

Which one fits you?

3RD

Serpier

Category AI visibility platform AI visibility, SEO and link building platform

Entry price Starter €99/month (€84 billed yearly) Starter €199/month; free Light plan without AI monitoring

Mid plans Pro €299, Growth €499 per month Growth €599 per month

Enterprise From €2,500/month, billed yearly Custom

How often AI answers are checked Daily on Starter, Pro and Growth; daily or rolling on Enterprise Weekly on Starter; custom interval on Growth

Volume at entry 40 AI answers a day (for example 40 prompts on one model, or 20 on two) Up to 100 prompts

AI models Up to 2 / 3 / 4 on Starter / Pro / Growth; up to 14 on Enterprise 3 on Starter (ChatGPT plus 2), 6 on Growth, unlimited on Enterprise

How answers are collected Each provider's API, plus ChatGPT consumer-app capture Not published

Brands and markets 1 brand in 1 market on Starter; any market from Pro; up to 10 brands on Growth 2 projects on Starter, 5 on Growth; unlimited countries and all languages

Users 2 on Starter; unlimited from Pro Unlimited seats

Why AI picks a competitor Diagnosis across five drivers Suggestions from Navi based on your site, SEO and AI data

Plan of work Playbooks toward a goal, checked daily Navi suggestions, done by Navi on credits after approval

Content Drafts in your brand voice, sent to HubSpot, Webflow, WordPress, Ghost, Sanity or Payload as drafts Navi writes drafts and can publish to WordPress, Shopify, Magento or Umbraco

Off-site placements Outreach briefs your team carries out Order SEO and AI Publications from 200,000+ media, paid per article

Link monitoring Tracks which pages AI cites; no link monitoring Publication Tracker checks placed links stay live, indexed and unchanged

Google rank tracking No. Search Console data seeds prompts and sits next to visibility Yes: Google, Yahoo or Baidu, desktop and mobile

Ads in AI answers Ads tracking, and OpenAI Ads from the same plan Not described as a feature

Data out CSV, Looker Studio, read-only REST Export API from Pro, read-only MCP MCP on every plan, API on Enterprise, CSV export of the Publication Tracker on Growth and Enterprise

Connections Search Console, GA4, Piwik PRO, Slack, six CMSs as drafts, six task tools Google Analytics, Search Console, Shopify, WordPress and 1,500+ apps

Trial 7-day free trial, no card needed 7-day free trial on Starter, card needed

Data Stored in the EU, encrypted, GDPR DPA EU hosted

Company Third Law ApS, Copenhagen Serpier ApS, Aarhus, founded 2024

Side by side

3RD and Serpier, side by side

Our data

What our data shows

Across 100 brands and 5.9 million citations (19 Sep to 18 Oct 2026), a median of 6.8% of the sources AI cited in a brand's category pointed to the brand's own domains (3RD, State of AI visibility Q4 2026). Off-site work matters, and that is Serpier's strength. 3RD shows which sources AI cites in your category, so you know where a placement would count. Of 117 tasks measured against a control group of the same brand's untouched prompts, 29% moved visibility up, 26% down and 44% showed no clear effect (3RD, State of AI visibility Q4 2026). That is why 3RD finds the driver first and keeps estimated impact apart from measured change. Prices on this page are monthly, excluding VAT, as listed on each pricing page on October 31, 2026.

Magnus Windeløv

Buying more links is one answer to weak AI visibility. Before you spend on it, find out whether links are what's holding you back. Often it's a page you don't have, or one AI can't read.

Head of Marketing, 3RD

From 3RD

Why we built it this way

Link building and placements. A media network of 200,000+ sites, with publications ordered from inside the product, even on the free plan. 3RD gives outreach briefs; your team or agency does the outreach.

Checking placed links. The Publication Tracker checks every placed article stays live, indexed and unchanged. 3RD does not monitor links.

SEO rank tracking. Google, Yahoo and Baidu rankings. 3RD is not a rank tracker.

Publishing for you. Once you approve, Navi publishes straight to WordPress, Shopify, Magento or Umbraco. 3RD sends drafts, and your team publishes.

More room at entry. Starter includes 100 prompts, 2 projects, unlimited countries and unlimited seats, and there is a free Light plan.

More AI models on mid plans, and more connections. Growth covers 6 models (3RD Growth: up to 4), MCP is on every plan, and Navi connects to 1,500+ apps.

Be fair

Where Serpier is stronger

Daily answers from the entry plan. 3RD checks every day from Starter up; Serpier Starter checks weekly.

A lower entry price. 3RD Starter is €99 a month; Serpier Starter is €199.

The reason, not only the result. The diagnosis shows which of five drivers holds you back for each prompt.

One plan toward your goal. Playbooks rank content, technical, outreach and ads tasks and are checked daily against new answers.

Your voice, your call. Drafts go to HubSpot, Webflow, WordPress, Ghost, Sanity or Payload, and tasks sync with Monday.com, Asana, Trello, ClickUp, Jira and Linear.

Ads in AI answers. Ads tracking and OpenAI Ads put earned and paid in one plan.

Your data, your way. CSV, Looker Studio and a read-only REST Export API from Pro, plus MCP for Claude and ChatGPT. And a trial with no card.

Where we win

Where 3RD is stronger

Proof

One marketer, zero to the top five in a quarter