Comparison
3RD vs Serpier: buy placements, or find out why AI picks a competitor.
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.
How 3RD works
Diagnose, plan, then draft, per market
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.
Decide
Which one fits you?
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.
Side by side
3RD and Serpier, side by side
| 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 |
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.
From 3RD
Why we built it this way
“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.”
Be fair
Where Serpier is stronger
- 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.
Where we win
Where 3RD 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.
Proof
One marketer, zero to the top five in a quarter
Boë Beauté started at 0.0% AI visibility. One in-house marketer with no GEO or SEO specialist background followed the plan, and within a quarter the brand reached 22.2% visibility and the top five of seven competitors. Read the case →
FAQ
3RD or Serpier: what buyers ask
Is Serpier or 3RD better for AI visibility?
It depends on your plan. If buying placements and tracking Google rankings are central, Serpier covers both in one tool. If you want daily AI answer data, a diagnosis of why AI picks competitors and a plan your team carries out in its own voice, 3RD is built for that.
Does 3RD publish to my website?
No. 3RD sends finished drafts to your CMS (HubSpot, Webflow, WordPress, Ghost, Sanity or Payload). Your team approves and publishes. Serpier's Navi can publish directly once you approve.
Can I buy links or publications in 3RD?
No. 3RD shows where to earn mentions and writes outreach briefs. Serpier sells SEO and AI Publications through its media network.
Does 3RD track Google rankings?
No. 3RD uses Search Console to suggest prompts and shows Search Console, GA4 and Piwik PRO data next to your AI visibility, but it does not track rankings.
How does 3RD collect AI answers?
3RD asks each AI model through its API, with the market set as context. For ChatGPT, it can also capture answers from the consumer app people use. Each daily answer is one question, on one model, in one market. See Methodology.
How do the prices compare per answer?
3RD Starter gives 40 AI answers a day for €99 a month, about €82.50 per 1,000 answers. Serpier counts prompts per plan and runs them weekly on Starter, so compare the answers each plan gives you in a month, not only the prompt count.
Can I run both?
Yes. Some teams use a link-building tool for placements and 3RD for daily AI answers and the plan. 3RD shows which pages AI cites, owned or earned, so you can see whether new placements get picked up.
Is there a free trial?
3RD has a 7-day free trial with no card needed. Serpier offers a 7-day free trial on Starter, which needs a card, and a free Light plan without AI monitoring.
Sources
Sources and last update
Serpier: serpier.com/pricing, serpier.com/ai-instructions, /faqs, /lp/ai-visibility-check, and docs.serpier.com (marketplace, suggestions, seo-performance, publication-tracker, connectors), checked October 31, 2026. 3RD: docs.get3rd.com, pricing, integrations, methodology and security. Spotted something out of date? Tell us at hello@get3rd.com. See all comparisons →
Your turn
See the difference on your own brand.
Seven days of full access: your competitors, your markets, and why AI chooses them over you.