Rohit Bhadange is CEO and co-founder of Zamp, a managed sales tax compliance platform for ecommerce and SaaS companies, at zamp.com.
The prompt that matters is the one a founder types when choosing sales tax compliance software: “What is the best sales tax compliance software for ecommerce and SaaS startups?” When ChatGPT and Gemini leave Zamp out, the sales team starts every conversation from behind. When those answers name Zamp as a done-for-you managed service, the demo is a different meeting.
“Our sales team noticed the change before I told them anything. Prospects were coming in already understanding the product. Demo-to-paid conversion moved from around 12 percent to roughly 30.”
What did ChatGPT and Gemini say about sales tax software before Zamp was named?
Before this work, neither ChatGPT nor Gemini named Zamp for that sales tax compliance software prompt. ChatGPT’s shortlist was Anrok, Numeral, Kintsugi, TaxJar, and Stripe Tax. Gemini’s top cards were Numeral, Anrok, and TaxJar. Zamp, a managed option for ecommerce and SaaS startups, was not in either answer.
ChatGPT · Before
Gemini · Before
How does answer engine optimization change AI search results?
Answer engine optimization for Zamp measures what ChatGPT and Gemini already say, puts an accurate account of the product into the sources those engines trust, and measures again. The AEO Company runs that as Baseline, then Engineer, then Compound.
Read more about how our AEO method works, the AI visibility research behind it, or get a free teardown of your own prompts.
Where does Zamp rank now in ChatGPT recommendations and on Gemini?
On Gemini, the same prompt now opens with Numeral first and Zamp at #2, on the second card, marked best for fully managed compliance. On ChatGPT, the opening names Anrok, Zamp, Numeral, Kintsugi, and Stripe Tax as the top platforms, and Zamp is the second row, a done-for-you managed service.
That is a different position than a brand that is not in the answer at all. Zamp is named in the ChatGPT recommendations, ranked on Gemini, and described in the terms a buyer would actually use for sales tax compliance software.
Gemini · After
ChatGPT · After
Where does Zamp show up now for the best sales tax software for ecommerce?
Zamp is also named on public comparison pages about the best sales tax software for ecommerce, published in the second half of 2026. Those pages include a TaxCloud listicle, a SearchEye guide, a Compliance AI Scout alternatives article, and an RFP.wiki vendor profile. Each line has the source, the date on the page, and a link out.
- TaxCloud, 24 September 2026. “11 Best Sales Tax Software for Ecommerce.” Zamp is third in the glance table.
- SearchEye, 2 October 2026. “Sales Tax Software in 2026: 8 Best Platforms.” Entry 7 is “Zamp: Filing Included, Not Itemized.”
- Compliance AI Scout, 19 October 2026. “7 Best Zamp Alternatives in 2026.” The page is built around Zamp as the reference product.
- RFP.wiki, 13 August 2026. Vendor profile updated 13 August 2026, “Zamp - Reviews - Tax Software.”
Questions about this case study
What is the best sales tax compliance software for ecommerce and SaaS startups, according to this page?
This case study does not pick a single winner. It reports what the answers showed. For that prompt, Gemini’s later answer opens with Numeral first and Zamp at #2. ChatGPT names Zamp among the top platforms, in the second row of the table.
How long did this result take?
It took 135 days to get to the answers on this page. That is the time to the result. A lot of these companies still work with us.
What did Zamp’s founder say about demo-to-paid conversion?
Rohit Bhadange said his sales team noticed the change before he told them anything, that prospects were coming in already understanding the product, and that demo-to-paid conversion moved from around 12 percent to roughly 30.
How does The AEO Company do answer engine optimization?
We measure what ChatGPT, Gemini, and Perplexity already say, get an accurate account of the product into the sources those engines trust, and measure again. On our site the passes are Baseline, Engineer, and Compound.
Is Zamp compared with Anrok and TaxJar in these AI answers?
Those names appear because ChatGPT and Gemini used them in the same answers. Before, both engines named Anrok and TaxJar, among others, and did not name Zamp. After, Zamp appears alongside Anrok on both engines.
Which AI engines does this case study cover?
The before and after screenshots are from ChatGPT and Gemini, on the same sales tax compliance software prompt. The method also measures Perplexity. This page does not include a Perplexity screenshot.