4.8 out of 5 stars
(1887 Ratings)
Tremendous is the easiest way to distribute digital rewards and incentives globally. Tremendous allows you to instantly reward your recipients using gift cards, prepaid Visa®, cards, cash, or other digital rewards. Companies large and small can easily track, buy, and manage incentive programs at scale with us. Tremendous allows customers to send rewards individually or in bulk. Our API also allows customers to integrate with our API and automatically send rewards.
We work with top brands around the world to support their specific use cases, such as market research, customer loyalty and health & wellbeing, employee rewards, referrals, etc.
Tremendous is completely free to use. There are no platform fees
Tremendous is currently the only platform that allows cash disbursements (Bank/ACH, PayPal).
Tremendous has the best international coverage (230+ countries and regions).
Tremendous has created the best API in the industry
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4.7 out of 5 stars
(136 Ratings)
InboxAlly is email deliverability software that moves your messages out of spam and promotions and into the primary inbox. It builds and protects sender reputation, warms new domains and IPs automatically, verifies inbox placement across the major mailbox providers, and monitors blacklists in real time. It layers onto any ESP or SMTP setup without changing how you send. Every plan carries a REST API, a dedicated customer success manager and 24/7 live support. Used by marketers, agencies, cold outreach teams and deliverability consultants.
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Riddle Quiz Maker
5.0 out of 5 stars
(25 Ratings)
Riddle: Interactive Content Platform
Riddle is a no-code platform for creating quizzes, polls, surveys, personality tests, prediction games, and leaderboards. Build content in the editor and embed it on your website, in apps, or share via direct link.
What makes Riddle different
Unlike Typeform, Outgrow, and Jotform, Riddle offers unlimited responses, views, and leads at every paid tier. A quiz that goes viral costs the same as one that doesn't. Predictable cost regardless of audience size.
Who uses Riddle
Built for publishers, broadcasters, sports leagues, and consumer brands. Customers include BBC, Club Med, Tate, RTL, Funke Mediengruppe, Immediate Media, SRF, 20 Minuten, and the Fiesta Bowl. Also used by agencies, SMEs, and consultants.
Key features:
Unlimited views, starts, responses, and leads on every paid plan
15+ content formats combinable in a single Riddle
No-code builder with white-label and CSS customization
Web and in-app embedding plus standalone URLs
Built-in sweepstakes and prize-draw mechanics
Native integrations: HubSpot, Salesforce, Mailchimp, Brevo, GA4, GTM, plus webhooks and full API
AI-assisted content generation
Team collaboration with role-based permissions
GDPR and hosting
Built and hosted in Germany under EU data protection law. Consent-based, zero-party data collection with no tracking pixels or third-party cookies. Suitable for public broadcasters and regulated industries.
Pricing
Flat-fee tiered plans from $119 to $749/month. No usage caps. 14-day free trial, no credit card required. 30-day money-back guarantee. 20% non-profit discount.
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ShortStack
ShortStack is a digital marketing platform that focuses on engagement, lead collection, and marketing automation. You can create unique contest landing pages, quizzes, and games, and send emails to analyze the results. Our templates are ready-made and customizable so you can quickly create mobile-responsive landing pages.
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