The SEO4Ajax Insider’s Guide
Everything we know about SEO4Ajax in one document: what it costs, its grades, getting a refund, getting help and what else to look at. Read it here, or keep a copy.
SEO4Ajax
The Insider’s Guide
Dynamic rendering service that serves JavaScript pages to bots
Every plan, grade, refund rule and rival among technical SEO tools, read from SEO4Ajax’s own pages.
Made by Capsule Code · checked Oct 23, 2026 · toolgpa.com
Contents
- 01WelcomeWhat it is, who it suits, its grades and the ten things to know first
- 02What it costsEvery plan, the free plan, ways to pay less and how prices have moved
- 03What it doesIts main features, where it runs, what it works with and who makes it
- 04Where it standsIts grades against its category, and whether to keep it or make your own
- 05The alternativesThe tools it is most often weighed against, side by side
- 06Quick answersThe questions people ask about it, each answered in a line or two
- 07About ToolGPAWho made this guide, what else is on the site, and how to cite it
ToolGPA put this guide together from SEO4Ajax’s own pages, its app-store listings and our grades. Every fact in it is on SEO4Ajax’s page too, where it is kept up to date. Checked Oct 23, 2026.
Part 01 · Overview
Welcome
What it is, who it suits, its grades and the ten things to know first
2.2
GPA, above 20 of the 83 other technical SEO tools we grade
SEO4Ajax is a dynamic rendering service for JavaScript sites built with React, Vue, Angular and other frameworks. It crawls the site with Chrome, keeps rendered snapshots in a cache and serves them to search engine and social network bots through a few lines of server configuration. Its console reports bot activity, cache freshness, duplicates and broken links.
To get you started, here are 9 things to know about SEO4Ajax, taken from its own pages and our grades.
You add its snippet to Apache, Nginx or IIS, or a middleware for Express, Django, Rails or Java, before bots see anything.
- 1
Best for dynamic rendering for small JavaScript sites
SEO4Ajax crawls a JavaScript site with Chrome and serves cached snapshots to search and social bots, with a free plan for 1,000 pages a month.
- 2
Paid plans start at $29 a month
As its pricing page puts it: $29 per month for 20,000 pages, yearly commitment ($39 monthly).
- 3
There is a free plan
Developer plan: 1,000 pages and 2,500 snapshots a month with community support, free for good and with no credit card needed.
- 4
It runs on Web
Web.
- 5
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.
- 6
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.
- 7
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.
- 8
A 2.2 GPA, above 20 of 83
That is against the other technical SEO tools we grade, on value, the free plan, features, ease of use and platforms.
- 9
Keep it
Nothing SEO4Ajax does is plain enough to make in a weekend. The 2 things listed below take a company.
SEO4Ajax at a glance
- Pricing
- Free plan, from $29 per month for 20,000 pages, yearly commitment ($39 monthly)
- Free plan
- Yes
- Free trial
- None stated
- Runs on
- Web
- Made by
- Capsule Code
- Category
- Technical SEO & Site Audits
- Our grade
- 2.2 GPA, fair
The report card
Best for dynamic rendering for small JavaScript sites
SEO4Ajax crawls a JavaScript site with Chrome and serves cached snapshots to search and social bots, with a free plan for 1,000 pages a month. Every plan needs server configuration, SEO reports cost extra on the Premium versions, and leaving a yearly commitment early costs up to three months of fees.
| Subject | Grade | Comment |
|---|---|---|
| Value for money | C | Project is $29 a month on a yearly commitment ($39 monthly) for 20,000 pages and 3 sites, between this category's cheaper quarter and its middle. The Premium version with SEO reports is $39, and a 99.9% uptime SLA is extra on Growth and Business. |
| Free plan and trial | B | The Developer plan is free for good with no card: 1,000 pages and 2,500 snapshots a month with community support, which covers a small JavaScript site. |
| Features | C | Chrome snapshots served to search and social bots, capture hooks and rewrite rules, and a console showing bot activity, cache freshness, duplicates and broken links. It does dynamic rendering fully, but that's a smaller job, and SEO reports are Premium only. |
| Ease of use | D | No rating on record. You add its snippet to Apache, Nginx or IIS, or a middleware for Express, Django, Rails or Java, before bots see anything. |
| Platforms and integrations | B | Web, with server snippets and middlewares for Apache, Nginx, IIS, Express, Django and Rails, plus Cloudflare and CloudFront guides. No desktop or phone app. |
An A is worth 4 points, a B 3, a C 2, a D 1 and an F nothing. The GPA is the average of the five.
Who SEO4Ajax is for
- 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
Who it is not for
- 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
Good to know
Good for
- Single-page apps that search engines and social bots cannot read
- Developers who want rendering added through server config rather than code changes
- Small JavaScript sites that fit in 1,000 cached pages for free
Worth knowing
- 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.
Part 02 · Pricing
What it costs
Every plan, the free plan, ways to pay less and how prices have moved
$29
A month to start. There is a free plan too
SEO4Ajax has a free plan. Paid plans start at $29 per month for 20,000 pages, yearly commitment ($39 monthly).
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 Plan
Custom
For more than 500,000 pages or 10 sites, or custom support, SLA or browser counts.
The free plan
Developer plan: 1,000 pages and 2,500 snapshots a month with community support, free for good and with no credit card needed.
Read from seo4ajax.com on Oct 23, 2026.
Ways to pay less
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.
Stated on seo4ajax.com
Part 03 · Features
What it does
Its main features, where it runs, what it works with and who makes it
1
Place it runs: Web
Dynamic rendering service that serves JavaScript pages to bots. Here is what it does, as its own site describes it, and what it covers: public API, site audit.
It does dynamic rendering fully, but that's a smaller job, and SEO reports are Premium only.
- 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.
Where it runs
- Web
What it works with
- Apache
- Nginx
- IIS
- Express
- Django
- Ruby on Rails
- Cloudflare
- Amazon CloudFront
SEO4Ajax is made by Capsule Code.
Part 04 · Standing
Where it stands
Its grades against its category, and whether to keep it or make your own
20/83
Other technical SEO tools it is graded above
SEO4Ajax's GPA of 2.2 is higher than 20 of the 83 other technical SEO tools we grade, and level with 20.
It stands best on free plan and trial (B, above 51 of 83) and worst on ease of use (D, above 0).
Its paid plans start at $29 a month, against a middle price of $22.41 for the category: 27 of the 52 others that charge start lower.
On features, ease of use and platforms it scores 2.0 out of 4. 27 tools score higher and cost less.
Each grade against the category
Every bar is all 84 technical SEO tools we grade, cut by the letter each got. SEO4Ajax’s own letter is outlined.
- CValue for moneyAbove 9 of 83
- BFree plan and trialAbove 51 of 83
- CFeaturesAbove 10 of 83
- DEase of useAbove 0 of 83
- BPlatforms and integrationsAbove 27 of 83
Price against what you get
Each dot is one of 73 technical SEO tools. Further left costs less; higher up scores better on features, ease of use and platforms. SEO4Ajax is the marked dot.
What paid plans start at, a month (each step along is roughly double) →
Keep it, or make your own?
Whether this is something you could build for yourself with an AI app builder, and what you would give up.
Keep it
Nothing SEO4Ajax does is plain enough to make in a weekend. The 2 things listed below take a company.
That makes this kind of software worth paying for, not this one in particular: 43 of the 83 other technical SEO tools grade higher. It costs $348 a year.
What you could not
- A crawler that checks every page of a site.
- It plugs into other products, Apache, Nginx and IIS among them, and has an API.
What this rests on. SEO4Ajax’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
Part 05 · Alternatives
The alternatives
The tools it is most often weighed against, side by side
Prerender.io, Headless-Render-API and Alli AI
The 3 tools SEO4Ajax is most often weighed against, with where each one differs from it.
- 2.0GPA
Prerender.io
Free trial · from $59/mo
Serves rendered HTML of JavaScript sites to search and AI crawlers.
- SEO4Ajax has a free plan. Prerender.io does not, though it has a free trial.
- SEO4Ajax also covers site audit.
- Prerender.io also covers AI search visibility.
- 2.4GPA
Headless-Render-API
Free plan · from $9/mo
Headless Chrome API for pre-rendering, screenshots, PDFs and scraping.
- SEO4Ajax also covers site audit.
- Headless-Render-API also covers screenshots.
- 2.0GPA
Alli AI
Free trial · from $249/mo
SEO automation that edits pages and pre-renders them for AI crawlers.
- SEO4Ajax has a free plan. Alli AI does not, though it has a free trial.
- SEO4Ajax also covers site audit.
- Alli AI also covers rank tracking, a/B testing, AI search visibility, schema markup, internal linking and page speed.
Part 06 · Questions
Quick answers
The questions people ask about it, each answered in a line or two
14
Questions, each answered in a line or two
The short version of everything above, for when you only need the answer. Each one is told in full in its part of the guide.
Is SEO4Ajax free?
SEO4Ajax has a free plan. Developer plan: 1,000 pages and 2,500 snapshots a month with community support, free for good and with no credit card needed.
How much does SEO4Ajax cost?
SEO4Ajax lists 5 plans. Developer: $0.
What platforms does SEO4Ajax work on?
SEO4Ajax is available on Web.
Does SEO4Ajax offer any discounts?
SEO4Ajax publicly lists the following: Save 20% to 26% with a yearly commitment.
Does SEO4Ajax have an Android app?
No Android app was listed when its pages were read on Oct 23, 2026. SEO4Ajax is listed for Web.
Does SEO4Ajax have an iPhone app?
No iPhone app was listed when its pages were read on Oct 23, 2026. SEO4Ajax is listed for Web.
Is SEO4Ajax open source?
SEO4Ajax is not described as open source on its own site, as read on Oct 23, 2026.
Does SEO4Ajax have an API?
Yes. SEO4Ajax offers a public API, according to its own site.
What does SEO4Ajax integrate with?
SEO4Ajax's listing names Apache, Nginx, IIS, Express, Django, Ruby on Rails, Cloudflare and Amazon CloudFront.
Who makes SEO4Ajax?
SEO4Ajax is made by Capsule Code.
What are the alternatives to SEO4Ajax?
The closest alternatives to SEO4Ajax in our directory are Prerender.io, Headless-Render-API and Alli AI.
How does SEO4Ajax compare with other technical SEO tools?
SEO4Ajax's GPA of 2.2 is higher than 20 of the 83 other technical SEO tools we grade, and level with 20.
Is SEO4Ajax good value for money?
ToolGPA grades SEO4Ajax C for value for money. Its paid plans start at $29 a month, against a middle price of $22.41 for the category: 27 of the 52 others that charge start lower.
Could I make my own version of SEO4Ajax?
Nothing SEO4Ajax does is plain enough to make in a weekend. The 2 things listed below take a company.
Where this guide comes from
The prices, plans, platforms and features were read from SEO4Ajax’s own pages on Oct 23, 2026, and the grades were given on Oct 23, 2026. Graded from this listing, whose facts were read from SEO4Ajax's own pages on 23 October 2026. Not based on using the product, and shorter than our full reviews.
Every tool we list gets five grades, A to F, each with its reason, and a GPA that averages them. How each is decided is at toolgpa.com/grades. This guide is ToolGPA’s own work; it is not made, paid for or approved by Capsule Code. Prices change, so check seo4ajax.com before you buy.
Part 07 · About
About ToolGPA
Who made this guide, what else is on the site, and how to cite it
3,189
Tools graded, in 94 categories
ToolGPA grades software the way a school report grades a pupil: five subjects, a letter for each with the reason written beside it, and a GPA that averages them. Prices, plans and platforms are read from each maker’s own pages and dated, so you always know how fresh a figure is.
Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Every tool on the site has a guide like this one, free to download and pass on. It all lives at toolgpa.com.
3,189
tools graded
94
categories
426
price changes on record
579
apps priced in 12 countries
What else is on toolgpa.com
- SEO4Ajax, kept up to dateEverything in this guide, with prices and grades as they are todaytoolgpa.com/tools/seo4ajax
- How grades are givenThe rules behind every letter and every GPAtoolgpa.com/grades
- Value chartsWhat each tool costs against what it scores, for every categorytoolgpa.com/charts
- CompareAny two tools side by side, plan by plantoolgpa.com/compare
- Price changesEvery price rise and cut on record, each with its sourcetoolgpa.com/price-changes
- Prices by countryWhat apps cost on the App Store in 12 countriestoolgpa.com/prices-by-country
- Pay lessEvery public discount: yearly billing, students, nonprofitstoolgpa.com/save
- Keep or makeWhich tools are worth paying for, and which you could build yourselftoolgpa.com/keep-or-make
Scan for the live page
Prices and grades as they are today
Quoting this guide?
Please name ToolGPA and link to the live page, so readers can check the figures for themselves:
ToolGPA, "SEO4Ajax: The Insider's Guide", checked Oct 23, 2026. https://toolgpa.com/tools/seo4ajax
Know someone choosing between technical SEO tools?
Send them this guide: toolgpa.com/tools/seo4ajax/guide
ToolGPA elsewhere: youtube.com/@toolgpa
See our other guides
The best-graded technical SEO tools after SEO4Ajax, each with an Insider's Guide of its own.
- Technical SEO & Site Audits Insider's GuideEvery one of the 84 technical SEO tools we grade, compared
- Lighthouse Insider's GuideGoogle's open-source audit of page speed, accessibility and SEO3.2 GPA
- PageSpeed Insights Insider's GuideFree Google speed test with real-user Core Web Vitals and Lighthouse3.2 GPA
- Yellow Lab Tools Insider's GuideFree open-source audit of a page's speed and front-end code3.2 GPA
Choosing software? Every tool graded, every price dated.
Compare tools at toolgpa.com ›Everything in this guide is ToolGPA’s own summary of what SEO4Ajax’s pages, its app-store listings and public reviews said on the dates shown. Grades are our judgement under the rules at toolgpa.com/grades. Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. SEO4Ajax is a trademark of its owner, and this guide is not made, paid for or approved by Capsule Code. Prices and plans change: check seo4ajax.com before you buy.