A Free Delighted Alternative: Running Unlimited NPS Surveys on Your Own Domain

Net Promoter Score (NPS) is one of the simplest customer metrics in tech: you ask one standardized question on an 11-point scale (0 to 10), follow up with an open-ended "Why did you choose that score?", and calculate your promoter-detractor ratio.

Yet legacy customer experience platforms like Delighted charge $224 per month ($2,688/year) just to survey 1,000 respondents a month across email and web.

If your startup has 5,000 active users, surveying them quarterly on Delighted costs more than your production database hosting.

Here is how modern product and customer success teams are replacing Delighted with zero-cost, unlimited NPS engines hosted directly on their custom domains.

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The Absurdity of NPS Pricing Tiers

Delighted, Qualtrics, and Medallia built massive businesses by selling enterprise executive dashboards around a calculation you can run in four lines of JavaScript:

function calculateNPS(scores: number[]): number {
  const total = scores.length;
  if (total === 0) return 0;
  
  const promoters = scores.filter(s => s >= 9).length;
  const detractors = scores.filter(s => s <= 6).length;
  
  return Math.round(((promoters - detractors) / total) * 100);
}

That is the entire mathematical engine of Delighted.

When you pay $200+ a month, you are not paying for advanced artificial intelligence; you are paying for an email sender and an 11-button rating input.

The Delighted Pricing Breakdown vs. Modern Alternatives

Feature	Delighted Starter	Delighted Growth	InfiForm (Self-Hosted/Cloud)
Monthly Price	$224/month	$449/month	Free / Flat $0-$19/mo
Monthly Responses	1,000 responses	5,000 responses	Unlimited
Custom Subdomain	Enterprise Only	Enterprise Only	Included
Conditional Follow-up Logic	Limited	Standard	Full Logic Branching
Webhook / Slack Alerts	Standard	Standard	Instant Real-Time
Data Ownership	Vendor Cloud	Vendor Cloud	Direct Google Sheets / Postgres

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The 3-Step Architecture for a Superior NPS Engine

Building an in-house NPS engine that rivals Delighted requires three core components:

1. The Standardized 0–10 Question Layout

An NPS survey must adhere strictly to the classic Fred Reichheld wording:

"How likely are you to recommend [Product Name] to a colleague or friend?"

The input must display numbers 0 through 10 horizontally on desktop and as a responsive wrapped grid or slider on mobile devices.

2. Adaptive Conditional Follow-Up (The Real Value)

Static surveys ask everyone the same follow-up question. A high-converting NPS engine uses conditional logic to personalize the probe based on the score:

• If Score is 0–6 (Detractor):
  • Prompt: "We're sorry to hear that. What is the single biggest thing we could fix or improve to make your experience better?"
  • Optional: Direct Calendly embed to book a call with the Head of Product.
• If Score is 7–8 (Passive):
  • Prompt: "What is one feature or improvement that would convince you to give us a 10?"
• If Score is 9–10 (Promoter):
  • Prompt: "Thank you so much! What do you love most about using us?"
  • Ending Screen Action: Redirect directly to G2, Capterra, or Trustpilot to convert the praise into a public review.

3. Immediate Slack Alerts for Detractor Intervention

When an enterprise customer leaves a score of 3, waiting until your end-of-month reporting meeting to notice it guarantees churn.

With instant Slack integration:

🚨 Detractor Alert (NPS: 2/10)
User: sarah@acmecorp.com
Account Tier: Enterprise ($1,200/mo)
Feedback: "The export feature has been broken since Tuesday's release."
Action: [View Customer Profile] | [Open Linear Ticket]

Your Customer Success team can ping Sarah within seven minutes of her submission, apologize, resolve the bug, and prevent a contract cancellation before it happens.

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Why Custom Domains Matter for Customer Trust

When you send customers an email asking for feedback and the link points to delighted.com/t/x8k29s, open rates suffer. Corporate firewalls flag unfamiliar tracking domains, and security-conscious IT directors hesitate to click.

By hosting your surveys on feedback.yourdomain.com or survey.yourdomain.com:

1. Your brand remains 100% front and center.
2. Email click-through rates jump by 18% to 24% because the domain matches your sender identity.
3. Zero third-party cookies or tracker scripts are loaded into the respondent's session.

Stop paying thousands of dollars for simple survey math. Set up an unlimited NPS workflow once, connect it to your team's Slack or CRM, and keep your survey data clean, private, and permanent.