Side-by-side comparison · SEO & Analytics
Ahrefs vs Amplitude vs PostHog
Everything that matters when choosing between them, in one place: our rating, what each can do, what they cost, and the trade-offs.
Comparing 3 tools, the maximum.
At a glance
Pick it if: Marketers and business owners who want to see what competitors rank for and find keywords worth chasing.
Pick it if: Product and growth teams at apps and SaaS companies who want deep analytics and AI that spots changes for them.
Pick it if: Founders and product teams with a web app or SaaS who want analytics, replays and testing in one tool.
Ahrefs scores highest overall, but PostHog gives you more for your money. Which one is right comes down to what you value most.
Overview
| Attribute | Ahrefs | Amplitude | PostHog |
|---|---|---|---|
| In one line | Keyword research, backlink checks and site audits in one toolkit. | Product analytics with AI agents that watch your numbers and flag changes for you. | Product analytics, session replays, A/B tests and surveys in one tool, with an AI analyst. |
| Pricing model | Freemium | Freemium | Freemium |
| Starting price | $29/mo | First 2M events free | $0/mo base |
| Free plan | Yes | Yes | Yes |
| Works with Claude Code | Yes | Yes | Yes |
Rating breakdown
Our scores out of 5. The higher bar in each row is highlighted.
| Attribute | Ahrefs | Amplitude | PostHog |
|---|---|---|---|
| Overall rating | 4.4Winner | 4.0 | 4.2 |
| Ease of useHow quickly someone non-technical gets value from it. | 4.5 | 3.0 | 3.0 |
| FeaturesHow completely it covers its own job, and how well the pieces fit together. | 5.0 | 4.5 | 5.0 |
| Output qualityHow good the results are before you fix them. | 4.5 | 4.5 | 4.5 |
| Value for moneyWhat you get for the price, including the free plan. | 3.5 | 4.0 | 4.5 |
| Speed & reliabilityHow fast it is and how often it falls over. | 4.5 | 4.0 | 4.0 |
Feature comparison
A tick means it does this today. A dash means we haven't checked.
| Attribute | Ahrefs | Amplitude | PostHog |
|---|---|---|---|
| Access & platform | |||
| Free plan | Yes | Yes | Yes |
| Mobile app | No | No | No |
| Desktop app | No | No | Yes |
| Browser extension | Yes | No | No |
| API access | Yes | Yes | Yes |
| Teams & business | |||
| Team workspace | Yes | Yes | Yes |
| Enterprise plan or SSO | Yes | Yes | Yes |
| Connects to other apps | Yes | Yes | Yes |
| Open source or self-hosted | No | No | Yes |
| AI abilities | |||
| Works with your files | Yes | No | No |
| Understands images | No | – | – |
| Makes images | No | No | No |
| Makes video | No | No | No |
| Writes code | No | No | Yes |
| Runs agents or automations | No | Yes | Yes |
| Learns your brand or style | No | – | – |
| Works in many languages | Yes | Yes | Yes |
| Capabilities score | 8/ 17 | 7/ 17 | 10/ 17 |
Pricing
Plans as listed on each vendor's site when we last checked. Confirm before you buy.
| Attribute | Ahrefs | Amplitude | PostHog |
|---|---|---|---|
| Plans | Ahrefs Free Free Checking the health and backlinks of a site you own. | FreeOur pick Free Startups and small apps. | Free Free Small apps and getting started. |
Starter $29/mo Occasional keyword research on a tight budget. | Plus First 2M events free, then usage-based Growing teams that need more charts and history. | Pay as you goOur pick $0/mo base, then per use Growing apps that outgrow the free limits. | |
LiteOur pick $129/mo A business doing its own SEO seriously. | Growth Custom Product teams at scale. | Boost $250/mo plus usage Teams that need SSO enforcement or HIPAA. | |
Standard $249/mo Freelancers and small agencies. | Enterprise Custom Large organisations. | Scale $750/mo plus usage Larger organisations. | |
Advanced $449/mo Agencies and in-house teams with many sites. | Enterprise $2,000/mo plus usage Big companies. | ||
Enterprise $1,499/mo billed yearly Large companies that need SSO and unlimited data. | |||
| Which plan to pick | Start on Ahrefs Free to audit your own site. If you want to research competitors and keywords every week, go straight to Lite; the Starter plan's credits run out too quickly to be useful for more than the odd lookup. Each plan includes one user, and extra seats cost $40 to $80 a month. | Start on Free, which includes the AI agents and MCP. Move to Plus when you need custom events, cohorts or alerts. Growth and Enterprise are for larger product teams and need a sales call. | Start free. Add a card to move to pay as you go when you need more projects or longer history, and set billing limits on each product so nothing runs away. The platform packages only matter for compliance or big teams. |
Key features
| Attribute | Ahrefs | Amplitude | PostHog |
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Pros and cons
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Who each one is for
| Attribute | Ahrefs | Amplitude | PostHog |
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Questions people ask
Which is better, Ahrefs, Amplitude or PostHog?
Ahrefs scores highest overall in our ratings (Ahrefs 4.4/5, Amplitude 4.0/5 and PostHog 4.2/5). Ahrefs is best for keyword research and competitor traffic estimates. Amplitude is best for deep product analytics for apps and AI agents that flag metric changes. PostHog is best for seeing how people use your app and finding where sign-ups and checkouts drop off.
Which is cheaper, Ahrefs, Amplitude or PostHog?
Ahrefs: There's a free plan, and paid plans start at $29/mo. Amplitude: There's a free plan, and paid plans start at First 2M events free. PostHog: There's a free plan, and paid plans start at $0/mo base.
Which is easier to use, Ahrefs, Amplitude or PostHog?
Ahrefs rates highest for ease of use in our scores. Marketers and business owners who want to see what competitors rank for and find keywords worth chasing.
How we compare
Ratings are our own, from using each tool, across ease of use, features, output quality, value for money, speed & reliability.
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