Alternatives · sub-processor monitoring
Which tools track vendor sub-processor and DPA changes?
Four kinds of tool do some of it. They differ on two things: who chooses the pages, and who works out your deadline.
Each tool below is quoted from its own pages, with the date we read them. None of them paid to be here, and none was asked.
The options
Four kinds of tool.
Two questions settle most choices: who finds the pages, and who counts the days.
Page-change monitor
Visualping, Distill
- Pages
- You find and add each vendor's list URL.
- Deadline
- You read the DPA and count the days.
- Price
- Both start free.
The vendor's trust center
Run on Vanta, Drata and others
- Pages
- The vendor decides what to publish and whether to send updates.
- Deadline
- You read the DPA and count the days.
- Price
- Nothing to buy: the vendor runs it.
Vendor risk platform
Vanta, OneTrust, Whistic
- Pages
- Part of a wider program: assessments, questionnaires, risk tiers.
- Deadline
- Not mentioned on the pages we read.
- Price
- Each asks you to request a demo.
Xither
AI vendors' lists and DPAs
- Pages
- We already know where each vendor we watch publishes.
- Deadline
- Matched to the vendor's window, with the closing date.
- Price
- From $10 a month.
1 · Page-change monitors
Visualping and Distill, in their words.
They watch any URL you give them, vendor lists included.
Visualping, on its own page
“Protect your brand, business, and bottom line by catching non-compliance from anywhere: your own website, your partners, third-party vendors, resellers, online marketplaces and more.”
read October 31, 2026
Visualping, on its own page
“Visualping starts free: 150 checks a month across 5 pages, at no cost and with no credit card.”
read October 31, 2026
Distill, on its own page
“Get instant alerts via notification, emails, SMS or apps when something changes”
read November 6, 2026
Distill, on its own page
“Keep monitoring free as long as you want.”
read November 6, 2026
Good for a handful of vendors you already know. Xither or Visualping, question by question
2 · The vendor's trust center
Trust centers, in their words.
The vendor runs it, so the vendor decides what you hear.
Vanta, on its own page
“Meet contractual obligations by keeping customers informed of key security updates through notifications to all subscribers or targeted groups.”
read November 6, 2026
Drata, on its own page
“Give prospects, customers, auditors, and other stakeholders a secure, self-serve destination to review your security posture, request access to documents, and get answers immediately.”
read November 6, 2026
Subscribe wherever a vendor offers it. You still need a list of who doesn’t. Where each vendor publishes
3 · Vendor risk platforms
Vanta, OneTrust and Whistic, in their words.
A whole third-party risk program, with monitoring as one part.
Vanta, on its own page
“Vanta’s TPRM Agent continuously monitors your vendor landscape for breaches, emerging threats and material changes.”
read October 31, 2026
OneTrust, on its own page
“Listen for real-time third-party changes and set automated rules to trigger actions and send notifications when new risks or vulnerabilities are detected.”
read October 31, 2026
Whistic, on its own page
“Detect breaches, disclosures, and vendor risk changes”
read October 31, 2026
Vanta, on its own page
“Request a demo to get started”
read October 31, 2026
OneTrust, on its own page
“Request a demo today to see how OneTrust can accelerate your third-party management program.”
read October 31, 2026
If you already pay for one, Xither does one narrower job beside it. How the two fit together
The product
4 · Xither: what arrives.
Built from a real change in the record: HubSpot's list, read September 2026.
Xither to you
HubSpot added three sub-processors for HubSpot AI
Three new rows on HubSpot’s sub-processor list. All three start on October 16.
- Baseten LabsAI Service Provider
- Bright DataWeb Search Results
- Exa LabsWeb Search Results
days to object, counted from when HubSpot notifies you. Your customer notice is drafted.
It arrives the morning we read the change, by email, Slack or Teams.
It says first whether you need to do anything. Most changes need nothing.
When one does, you get the closing date and a notice for your customers. How the date is worked out
Pick
When each one is the better pick.
A page monitor
You watch a few vendors, or pages that aren't vendor terms, and you're happy to count the days yourself.
The trust center
Always, where a vendor offers updates. It costs nothing, and it comes from the vendor itself.
A risk platform
You need questionnaires, risk scores and SOC 2 reviews across every vendor, not only AI ones.
Xither
Your product runs on AI vendors, you owe your customers notice, and you need the date your window closes.
Not sure we watch your vendors? Scan your sub-processor page.
Fit
Is Xither the right tool for you?
Xither is for software teams that build with AI vendors and sell to businesses. It keeps your public sub-processor list current and watches the pages your vendors publish about your data: sub-processor lists, DPAs, privacy and trust pages, and model retirement schedules. When one changes, you get a message in Slack, Teams or email saying whether you need to do anything, with the lines that moved and any date that applies.
It fits when
- You build software with AI vendors inside it, and your customers ask who handles their data. Check your code
- Your DPA promises customers a current sub-processor list and notice when it changes. What you owe
- Your vendors' DPAs give you a fixed window to object to a new sub-processor, and you need to know the day it starts. Meeting the deadline
- Security questionnaires ask you to list every AI sub-processor in your product. How to answer
- You need proof of what a vendor's page said on a given date.
Use something else when
- You want to watch any page on the web, like a competitor's pricing. A general page-change monitor does that. Xither or Visualping
- You need a whole vendor risk program: questionnaires, risk scores, SOC 2 report reviews and breach alerts. A third-party risk platform does that. Xither and risk platforms
- We don't watch your vendors yet. Run the free scan first, or ask us to add them. Scan your page
- You need to know what a clause means for your contract. That's a lawyer's job; we report what a page says.
Price
What Xither costs.
Two plans, paid by card: Essentials at $10 a month and Pro at $49 a month. A one-time due-diligence pack costs $149. The scan, the public record and the MCP server are free.
- Essentials: $10 a month or $99 a year: daily watch on every vendor you name; alerts by email, Slack or Teams; your sub-processor page, hosted and kept current; your customers subscribe to it and get each change by email; drafted notices for your customers; dated evidence you can export.
- Pro: $49 a month or $490 a year: everything in Essentials; a one-page review of any AI vendor before you adopt it; security-questionnaire answers about your AI vendors, in one export; a monthly vendor-monitoring report for your auditor; up to 5 people.
A 14-day free trial of Pro. No card, so nothing to cancel.
Visualping, Distill, Vanta, Drata, OneTrust, Whistic are trademarks of their owners. Xither is not affiliated with or endorsed by any of them. What they do is quoted from their own pages on the date shown.
Common questions.
- What tools track vendor sub-processor changes?
- Four kinds: a page-change monitor such as Visualping or Distill, the vendor's own trust center if it sends updates, a vendor risk platform such as Vanta, OneTrust or Whistic, and Xither, which watches AI vendors' lists and DPAs.
- What are the alternatives to Visualping for watching sub-processor lists?
- Distill is another general page monitor; its pricing page says you can keep monitoring free. Xither is narrower: it already knows where each AI vendor publishes its list, and it works out your deadline to object.
- Is there an alternative to Vanta or OneTrust for sub-processor tracking?
- For that one job, yes. Xither watches the lists and DPAs and dates each change. It doesn't run questionnaires, risk scores or SOC 2 reviews, so it sits alongside a risk platform rather than replacing one.
- Why not just subscribe to each vendor's trust center?
- Do, where the vendor offers it. It covers only vendors that send updates and that you remembered to subscribe to, and the email won't tell you your deadline. Some DPAs make the updated page itself the notice.
- Which is cheapest?
- The page monitors start free, by their own pricing pages. Xither starts at $10 a month after a 14-day free trial. The risk platforms we read ask you to request a demo.
Not legal advice.
This page compares tools for one job. Whether a vendor change affects your contracts is a question for your counsel.
Xither Staff Writer · reviewed November 6, 2026. Each tool is quoted from its own pages, read between October 31, 2026 and November 6, 2026. Prices and features change; check each tool's own page before you decide.
Hear the morning we read a change to your vendor’s sub-processor list or DPA.
Name the AI vendors in your product. When a page you watch changes a fact, you get the lines that moved and the date any window runs out.
Try it free for 14 daysNo card. Nothing to cancel.