Fullstory fits large teams that need its depth and can run a sales process. GrainQL fits small teams that want Kai to name the cause, at a published price.
14 days free. No card. Runs next to Fullstory.
Pick Fullstory if
Pick GrainQL if
Checkout conversion fell last week. You have thousands of sessions and one hour to find out what broke.
In Fullstory
Fullstory lets you search and segment every session, and StoryAI can summarize them. Asking it why needs the StoryAI Premium add-on, and it answers about the view you have open.
In GrainQL
Kai takes the question in plain words and gives a first answer in about 3 seconds. It names the cause and attaches the session recordings that show it.
You have a few hundred dollars a month to spend. Your founder wants the number today, not after three meetings.
In Fullstory
Fullstory has a free plan with 30,000 sessions a month. Past that, every paid plan is a quote from sales, and StoryAI and mobile are sold as add-ons.
In GrainQL
GrainQL publishes its prices, from $29 to $299 a month. Kai, replay and heatmaps are on every plan, and the 14-day trial needs no credit card.
You bought the tool with every feature. Six months later two people log in, and nobody has built the segments the rollout plan promised.
In Fullstory
Fullstory captures everything and rewards teams who define elements, build segments and keep dashboards current. That depth pays off when someone owns it.
In GrainQL
GrainQL installs with one script tag in about two minutes. Kai sends a daily digest and flags drops without being asked, so it works on the days nobody logs in.
The live demo runs on real data. Ask Kai a question and see what comes back.
Ask Kai on the live demoWhat each tool ships today, including the rows Fullstory wins. Checked against Fullstory’s own site in October 2026.
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Fullstory has a free plan with 30,000 sessions a month. Business, Advanced and Enterprise are quoted by sales, with StoryAI and mobile sold as add-ons.
GrainQL
From $29 a month for 50,000 monthly visitors. Billed by visitors, with unlimited events per visitor. Every feature is on every plan.
See every planUnder 30,000 sessions a month, Fullstory's free plan costs less than GrainQL. Above that, you need a quote to compare.
If one of these is your situation, stay where you are. We would rather tell you now than after a trial.
You need SSO, security reviews and a choice of US or EU data center. Your procurement team wants a vendor it already knows. Fullstory is built for that.
FullstoryFree gives up to 10 users session replay on 30,000 sessions a month, with 12 months of retention. GrainQL has a 14-day trial and no free plan.
Fullstory covers Flutter and React Native apps, in-app guides and surveys, and sends behavioral data to your other tools. GrainQL has native mobile SDKs only, no surveys and no sync.
Then see what Kai finds on your own traffic. One tag, about two minutes, and Fullstory keeps running.
GrainQL runs next to Fullstory on the same page. Keep Fullstory where it is, add one tag, and judge by what each tool tells you.
Paste one script tag in the head, or add it through GTM. Leave the Fullstory snippet and your saved segments exactly as they are.
Pick one real drop-off. Search it in Fullstory the way you do today, then ask Kai why it happened. Note how long each takes and what you learn.
If your team uses Fullstory's depth every week, keep it. If Kai's answers covered what you needed, put your renewal quote next to GrainQL's price list.
Free checklist
One page for running GrainQL next to Fullstory: what to install, what to compare, and how to call it after 14 days.
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Yes. FullstoryFree is a permanent plan with 30,000 sessions a month, 12 months of data retention and up to 10 users. Paid Fullstory plans are quoted by sales. GrainQL has no free plan, only a 14-day trial with no credit card.
StoryAI is real. It summarizes sessions, flags issues and answers questions inside Fullstory, and Ask StoryAI and Opportunities need the StoryAI Premium add-on. Kai is on every GrainQL plan. It answers a plain question in about 3 seconds and attaches the recordings as evidence.
Yes. GrainQL is one script tag that runs next to the Fullstory snippet, so nothing has to be removed. Run both for the 14-day GrainQL trial and compare what each one tells you about the same drop-off.
No. GrainQL does not import Fullstory sessions or segments. It starts collecting on the day you add the tag, so keep both tools running until GrainQL has the history you need.
It can be. Fullstory's default data center is in the US, and it has offered an EU data center on request since August 2022. GrainQL is hosted in the EU, in Finland, and is cookieless by default.
Quite a lot for a large enterprise. GrainQL has no free plan, no surveys or in-app guides, no warehouse sync and far fewer integrations. It is also a younger product with a smaller community.
Start the 14-day trial, add the tag next to Fullstory and ask Kai why it happened. No credit card, and nothing to remove.