No follow-ups, ever
Every respondent gets the exact same survey. There's no way to dig into an answer that deserves more attention.
Diaform vs Google Forms: when free forms hit their ceiling.
Google Forms is free and everywhere. Diaform is an AI interviewer that asks the follow-up. If "fine" and "ok" are killing your open-text column, you've outgrown the free option.
14-day free trial · No demo required
Feature-by-feature comparison
Google Forms
Interview format
AI-led conversation, every respondent gets a different path based on their answers, all from one shared link.
Static questionnaire. Same fields, same order, every respondent. Section-based branching exists but is brittle and pre-defined.
Follow-up questions
Adaptive follow-ups (1, 3, or 5 deep) generated per answer. The AI decides when an answer deserves probing and when to move on.
No follow-ups. If a respondent writes 'it was fine', Google Forms just moves on to the next question.
Voice answers
Whisper-powered voice input plus an ElevenLabs AI voice. Voice answers are typically 2-3× longer than typed responses.
Text only. No voice input, no audio capture, respondents type every answer on whatever device they're on.
Auto-synthesis
Per-response summary, sentiment, confidence, keywords, and notable quotes generated automatically. Themes surface without a coding session.
Pie charts for closed questions and a CSV column for open text. No themes, no sentiment, no synthesis at all.
Languages
Runs interviews in 30+ languages and reports synthesis back in English so the team can review without re-translating.
Form UI is localized via the respondent's Google account, but the survey itself is whatever language you typed.
Free tier
Diaform offers a 14-day trial (150 conversations, 2 projects, 1 seat), generous, but not free forever.
Free forever, unlimited responses, unlimited forms, unlimited respondents. Bundled with any Google account at zero cost.
Workspace integration
CSV export and HMAC-signed webhooks pipe data into Sheets, BI tools, or any stack. Not a native Google Workspace app.
Native to Google Workspace, one click to send responses into Sheets, share via Drive, embed in Sites, route via Gmail.
Mid-interview automations
13 topic + 5 sentiment triggers fire actions in flow: alert Slack, capture an email, offer a discount, book a meeting, redirect.
No in-flow actions. Submission triggers via Apps Script or Zapier exist, but only fire after the respondent finishes.
Branded experience
Branded subdomain by default (acme.diaform.io/c/...); custom domain on Business. Looks like a customer-facing product.
Default Google chrome with a small banner image. Looks like an internal Google Form, because that's what it is.
Best for
Customer-facing qualitative research where depth matters: churn, onboarding, concept tests, JTBD interviews.
Free internal use: RSVPs, class quizzes, simple signups, low-stakes Workspace polls. Hard to beat at zero dollars.
Interview format
Diaform
AI-led conversation, every respondent gets a different path based on their answers, all from one shared link.
Google Forms
Static questionnaire. Same fields, same order, every respondent. Section-based branching exists but is brittle and pre-defined.
Follow-up questions
Diaform
Adaptive follow-ups (1, 3, or 5 deep) generated per answer. The AI decides when an answer deserves probing and when to move on.
Google Forms
No follow-ups. If a respondent writes 'it was fine', Google Forms just moves on to the next question.
Voice answers
Diaform
Whisper-powered voice input plus an ElevenLabs AI voice. Voice answers are typically 2-3× longer than typed responses.
Google Forms
Text only. No voice input, no audio capture, respondents type every answer on whatever device they're on.
Auto-synthesis
Diaform
Per-response summary, sentiment, confidence, keywords, and notable quotes generated automatically. Themes surface without a coding session.
Google Forms
Pie charts for closed questions and a CSV column for open text. No themes, no sentiment, no synthesis at all.
Languages
Diaform
Runs interviews in 30+ languages and reports synthesis back in English so the team can review without re-translating.
Google Forms
Form UI is localized via the respondent's Google account, but the survey itself is whatever language you typed.
Free tier
Diaform
Diaform offers a 14-day trial (150 conversations, 2 projects, 1 seat), generous, but not free forever.
Google Forms
Free forever, unlimited responses, unlimited forms, unlimited respondents. Bundled with any Google account at zero cost.
Workspace integration
Diaform
CSV export and HMAC-signed webhooks pipe data into Sheets, BI tools, or any stack. Not a native Google Workspace app.
Google Forms
Native to Google Workspace, one click to send responses into Sheets, share via Drive, embed in Sites, route via Gmail.
Mid-interview automations
Diaform
13 topic + 5 sentiment triggers fire actions in flow: alert Slack, capture an email, offer a discount, book a meeting, redirect.
Google Forms
No in-flow actions. Submission triggers via Apps Script or Zapier exist, but only fire after the respondent finishes.
Branded experience
Diaform
Branded subdomain by default (acme.diaform.io/c/...); custom domain on Business. Looks like a customer-facing product.
Google Forms
Default Google chrome with a small banner image. Looks like an internal Google Form, because that's what it is.
Best for
Diaform
Customer-facing qualitative research where depth matters: churn, onboarding, concept tests, JTBD interviews.
Google Forms
Free internal use: RSVPs, class quizzes, simple signups, low-stakes Workspace polls. Hard to beat at zero dollars.
Two very different tools
Google Forms is the default because it's free, unlimited, and lives inside Google Workspace. For a quick RSVP or a class quiz, nothing beats it. The trade-off is everything else: bare-bones UI, no real branching, no analytics beyond pie charts, and no help making sense of open-text answers.
Diaform is built for the moment Google Forms stops being enough, when you need actual qualitative depth. The AI runs the interview, follows up when an answer is vague, and hands back summaries, sentiment, and notable quotes you can act on the same day.
Where Google Forms runs out of room
Pie charts and a spreadsheet
Analytics are minimal. Open-text answers land in a column with no themes, no sentiment, and no synthesis.
Looks like a Google Form
Polish matters when you're asking customers for time. The default chrome screams 'internal tool' rather than 'we care about your feedback'.
Where Diaform earns the upgrade
AI interviewer that adapts
Choose a probing intensity (1, 3, or 5) and the AI decides per answer when to follow up.
Voice or text
Respondents can speak naturally. Voice answers are typically 2-3× longer and far more candid.
Auto-synthesis
Per-response summary, sentiment, confidence, keywords, and notable quotes, generated, not coded by hand.
Triggered actions
13 topic triggers and 5 sentiment triggers can alert Slack, capture an email, offer a discount, or book a meeting in flow.
Branded experience
Branded subdomain by default; custom domain on Business. Looks like a customer-facing product, not a Google internal tool.
30+ languages
Run interviews globally in respondents' native languages with summaries in English.
Pick the right tool for the job
When Google Forms is the better fit
Stay on Google Forms for free, internal, low-stakes work, RSVPs, class quizzes, signups, simple Workspace polls. It's the right call when you already live inside Workspace, just need the response landing in a Sheet, and don't care about follow-up, synthesis, or branding.
When Diaform is the better fit
Reach for Diaform on customer-facing research where the answer matters, churn, onboarding, post-purchase, concept testing. You get sentiment, themes, and notable quotes generated for you, and the form actually feels like your brand instead of a generic Google page.
Frequently asked questions
Q
Is Diaform worth paying for if Google Forms is free?
For internal polls, no, stay free. For customer-facing feedback where you need depth, the upgrade pays for itself the first time you skip an hour of coding open-text answers.
Q
Can I keep using Google Forms alongside?
Yes. Many teams use Google Forms for internal stuff and Diaform for customer-facing research. They serve different jobs.
Q
How is pricing structured for Diaform?
14-day free trial (150 conversations, 2 projects, 1 seat). Pro is $89/mo or $74/mo annual; Business is $149/mo or $124/mo annual.
Q
Can respondents answer with their voice?
Yes, voice input via Whisper and a natural ElevenLabs voice from the AI side. Google Forms is text-only.
Q
Does it integrate with Google Sheets?
Diaform supports CSV export and HMAC-signed webhooks (3 trial / 5 Pro / 10 Business) so you can pipe data into Sheets or any BI stack.
Q
Will my data train AI models?
No. Diaform does not use customer conversation data to train AI models.
Explore more
Dive into the other ways Diaform can power your research.
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