Of all the B2B categories evaluating ChatGPT Ads in India, self-serve and freemium B2B SaaS is arguably the best early fit — and the reason comes directly from the launch's own targeting restriction, not from any SaaS-specific feature OpenAI has built.
Ads only reach logged-in adults on ChatGPT's Free and Go tiers. B2B SaaS buyers evaluating a self-serve tool — a founder comparing project management platforms, a solo marketer researching an email tool, a small team lead evaluating a CRM — are exactly the profile likely to be using ChatGPT on a personal Free or Go account rather than a company-provisioned enterprise seat. This alignment between buyer profile and available inventory is the main reason SaaS should move earlier than most other B2B categories.
Most B2B SaaS companies already produce exactly the content type that performs well in this format without building anything new: comparison pages ("Tool A vs Tool B"), alternative pages ("Tool A alternatives"), and pricing pages. These pages are naturally specific, naturally structured as direct answers, and naturally aligned with the kind of research-stage question a Free-tier ChatGPT user is likely to be asking.
Trial-to-paid conversion rate for leads from this channel specifically, not just trial signups, since a channel that generates cheap trial signups that never convert to paid is a worse allocation of budget than a more expensive channel with a higher-quality funnel. Track this cohort separately from your existing channels for at least one full sales cycle before drawing conclusions.
SaaS comparison and alternative pages are also exactly the content type most likely to earn organic AI citations through GEO work. Running ChatGPT Ads against these pages while simultaneously strengthening them for organic citation (specific data, named case studies, structured comparison tables) compounds the investment across both the paid and earned path at once.
A realistic first budget: given the low daily floor and the naturally good fit, most Indian B2B SaaS companies can justify a genuine one-month test across these three campaign types for a total spend comparable to a single month of a mid-tier LinkedIn Ads test — low enough risk that "we haven't tried it yet" is a harder position to defend after September 4.