PreRender24 vs SEO4Ajax (2026): which should you pick?

Pick PreRender24 if

• Fits if your React, Vue or Lovable app looks empty to search crawlers
• Works for sites that want GPTBot and ClaudeBot to read their content

Look elsewhere if

• Watch out: setup moves your domain's nameservers to Cloudflare
• Skip it if you want a free plan, as a paid one is needed after the 14-day trial
• Tight if your content changes often, as Starter re-renders every 7 days with 2 manual recrawls a month
• Pricey if you want daily cache refreshes, which need Agency at €199 a month
• Watch out: prices are in euros, and going past your pageviews brings alerts and a prompt to upgrade

Pick SEO4Ajax if

• Fits if you run a small JavaScript site under 1,000 pages and can edit its server config
• Works for sites that need search bots and social previews to see rendered pages

Look elsewhere if

• Watch out: a yearly commitment is still charged monthly, and leaving early costs the lesser of three months of fees or half of what remains
• Pricey if you want the SEO reports, which need Premium at $10 to $66 a month more on a yearly commitment
• Tight if you go over your pages, at $1.50 per 1,000 extra on Project
• Not for you if you run more than 3 sites on Project, as plans cap sites at 3, 5 or 10
• Watch out: the 99.9% uptime SLA is an extra $39 or $79 a month on Growth and Business

PreRender24

• Setup moves the domain's nameservers to Cloudflare; PreRender24 creates the zone, so no Cloudflare account of your own is needed.
• There is no free plan: after the 14-day trial a paid subscription is required, and prices are in euros.
• Starter refreshes its cache only every 7 days with 2 manual recrawls a month; daily refresh needs Agency at €199 a month.
• Going past the monthly pageview limit does not stop the service, but brings alerts at 80% and 100% and a prompt to upgrade.

SEO4Ajax

• A yearly commitment is still charged monthly, and cancelling it early costs the lesser of three months of fees or half of what remains.
• Pages beyond the allowance cost $1.50 per 1,000 on Project, $1.00 on Growth and $0.50 on Business.
• SEO reports need the Premium version of each plan, which costs $10 to $66 a month more on a yearly commitment.
• Plans cap the number of websites at 3, 5 or 10, and a 99.9% uptime SLA is an extra $39 or $79 a month on Growth and Business.

PreRender24

Crawler detection at the edge

Recognizes search engine and AI crawlers such as Googlebot, Bingbot, GPTBot, ClaudeBot and PerplexityBot by user agent, and sends human visitors straight to the origin.

Cached rendered HTML

Runs on Cloudflare Workers: each page is rendered once, cached at the edge and served to crawlers as finished HTML instead of an empty JavaScript shell.

Scheduled cache refresh

Cached pages are re-rendered every 7 days, every 3 days or daily depending on the plan, with 2, 10 or unlimited manual recrawls a month.

Crawl log

The dashboard logs every bot visit as it happens, alongside the domain's SEO score, prerender status and origin URL.

SEO and AI visibility checks

Monitors an SEO score, Core Web Vitals from the PageSpeed Insights API and Google rankings for chosen keywords, and tests whether AI models mention a brand.

IndexNow, hreflang and free checks

Pings search engines through IndexNow when content changes and supports hreflang. Free SEO scan, bot check and DNS check tools are on the site.

SEO4Ajax

Dynamic rendering for bots

Pages are captured with a current version of Chrome and the cached snapshots are served to search engines such as Google and Bing and to social networks.

Server snippets and middleware

The console gives configuration snippets for Apache, Nginx and IIS, and there are middlewares for Express, Django, Rails and Java plus guides for Cloudflare and CloudFront.

Dedicated capture browsers

Each plan has dedicated browsers that capture pages in parallel; one browser averages about 200,000 captures a month, enough to refresh a Project site every 3 days.

Console metrics

Shows bot activity, cache freshness, duplicate pages and broken links for each site, with metadata exports to CSV.

Capture hooks and rewrite rules

Control how pages are captured and return HTTP errors or redirects to bots, page by page or by URL pattern.

SEO reports

Premium plans add reports on technical issues that can hurt indexing, such as broken links, duplicates and invalid hreflang tags.

PreRender24

• Starter€9.99

  per month for 1 domain and 300 pages, billed monthly

  150k pageviews a month, cache refreshed every 7 days, 2 manual recrawls a month and email support.

• Pro€29.97

  per month for 3 domains and 1,500 pages, billed monthly

  600k pageviews a month, cache refreshed every 3 days, 10 manual recrawls a month and priority support.

• Agency€199

  per month for 100 domains and 50,000 pages, billed monthly

  5 million pageviews a month, daily cache refresh, unlimited manual recrawls and dedicated support.

• EnterpriseCustom

  Unlimited domains, a custom SLA, a dedicated account manager and an on-premise option, quoted on request.

SEO4Ajax

• Developer$0

  1,000 pages and 2,500 snapshots a month, with community support.

• Project$29

  per month for 20,000 pages, yearly commitment ($39 monthly)

  Up to 3 websites, 1 dedicated browser and email support within 48 hours. The Premium version with SEO reports is $39 ($52 monthly).

• Growth$99

  per month for 100,000 pages, yearly commitment ($129 monthly)

  Up to 5 websites, 5 dedicated browsers and email support within 24 hours. The Premium version with SEO reports is $132 ($172 monthly).

• Business$199

  per month for 500,000 pages, yearly commitment ($249 monthly)

  Up to 10 websites, 10 dedicated browsers and email support within 24 hours. The Premium version with SEO reports is $265 ($332 monthly).

• Custom PlanCustom

  For more than 500,000 pages or 10 sites, or custom support, SLA or browser counts.

PreRender24

• Annual discount

  Save 20% with yearly billing

  PreRender24's pricing page has a Monthly/Yearly toggle marked Save 20%, and its pricing FAQ says yearly billing saves 20%.

SEO4Ajax

• Annual discount

  Save 20% to 26% with a yearly commitment

  Project is $29 a month on a yearly commitment instead of $39 month to month, Growth $99 instead of $129, and Business $199 instead of $249.