
PDFShift
DocRaptor
PDFCrowd
pdflayer
HTML PDF API
PDF my URL
HTML2PDF.fr
PDF Generation API, powered by AWS Lambda. HTML to PDF | URL to PDF | Office Doc to PDF | Merge PDFs . Supports wkhtmltopdf, Headless Chrome, and LibreOffice. No rate limits and no file size limits.

Group Greeting
Kudoboard
GroupTogether
Sendwishonline
RecoCards.com
Thankbox
Givetastic
Group greeting cards your whole team signs together. Birthdays and work anniversaries run on autopilot. Send cards for farewells, promotions, or any occasion, with video, voice, and photos. Free for teams up to 10.

Which is more popular?
Based on our record, Api2Pdf seems to be more popular. It has been mentioned 4 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | api2pdf.com | huddlecard.com |
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| Company | โ | Startup from the United States ยท 1 - 9 employees ยท 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


Api2Pdf.com is an easy-to-use REST API that gets you converting HTML to PDF in minutes. You don't need to worry about installing a PDF rendering engine on your local developer environment and wrangle with it when you deploy your web app to production. Api2Pdf is a wrapper for WKHTMLTOPDF,...
HuddleCard turns scattered birthday emails and last-minute card signatures into something your team actually looks forward to. Everyone contributes to one card - video messages, voice notes, photos, GIFs, and private notes - that lands as a single beautiful page on the big day. ๐ Birthdays &...
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


No analysis of Api2Pdf yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Generate PDFs from .NET with Api2Pdf.com
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How often each product is chosen within a category, 0โ100% relative to the other.


As answered by people managing Api2Pdf and HuddleCard.
HuddleCard's answer:
HuddleCard turns a greeting card into something a whole team builds together and keeps alive. Three things set it apart: birthdays and work anniversaries are fully automated, so nobody has to remember or chase anyone; cards aren't just text, with in-browser video, voice notes, photos and GIFs; and the card doesn't go quiet after delivery, staying alive with likes, comments and threaded replies. It also has a fairer pricing model than anyone in the category: you pay only for teammates who actually participate, never your full headcount.
HuddleCard's answer:
Most group-card tools are manual. You remember the occasion, you start the card, you nag people to sign. HuddleCard automates the whole birthday and anniversary cycle so it just happens every week. It also goes deeper than a stack of text messages, letting your team add 10-second video and voice notes right in the browser with no app to install, and it keeps the conversation going after delivery instead of ending the moment the card is opened. On top of that, you only pay for people who actually sign or open a card, so a 200-person company isn't billed for 200 seats. For Slack teams especially, the whole flow lives where they already work.
HuddleCard's answer:
People-ops, HR and team leads at small and mid-sized companies who want to celebrate their team consistently without it becoming a chore. It's an especially strong fit for remote and distributed teams that use Slack, where birthdays and milestones are easy to miss and small moments of connection matter most. The free tier suits teams up to 10, while the pay-per-active-user model scales comfortably to larger organizations.
HuddleCard's answer:
Workplace birthday celebrations are broken in both directions. Either it's a low-effort emoji reaction in #general that nobody remembers five minutes later, or it's a surprise ambush in the break room that makes half the team want to disappear. There's a post on r/introvert with 511 upvotes from someone who took PTO on their birthday just to avoid the attention (I did the same). And on r/humanresources, 424 upvotes asking "When did HR become synonymous with Party Planner Extraordinaire?"
I built the first version of HuddleCard more than ten years ago. The idea was simple: a week before someone's birthday, pass a card around the team. Everyone signs it in secret. On the day, it shows up full of real messages from real people. No chasing, no spreadsheets, no awkward singing. Just something genuinely warm, delivered on time.
A handful of companies found it organically, including Thermo Fisher, Beth Israel Deaconess Medical Center and Planet Fitness, and kept using it. But I never monetized it. I was working full-time as an engineer, life stuff happened and eventually I convinced myself Kudoboard did it better and moved on.
In 2025, a close friend and CTO managing a distributed team told me he was tired of his own birthday and anniversary messages feeling like an afterthought. He wanted it to feel real but didn't have time to make it real. I'd built exactly that, years ago, and given up on it.
So I rebuilt it. All of it. The entire stack. New infrastructure, new billing, new everything. My co-founder Werner Burger, a founding member of the design studio Trickery, came on board and redesigned it from scratch. We called the project Phoenix internally, because that's what it is.
HuddleCard now handles birthdays, work anniversaries and occasion cards for any moment worth marking: farewells, promotions, new babies, team thank-yous. It integrates with Slack, supports photos, GIFs, video and voice messages, and people can opt out of receiving cards entirely while still celebrating others. It runs quietly in the background so nobody has to think about it.
I'm still building. I don't think it'll ever be perfect. But every team deserves a better way to tell each other "you matter" without making anyone uncomfortable in the process.
HuddleCard's answer:
HuddleCard's answer:
Share your experience with using Api2Pdf and HuddleCard. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


My colleague and I built api2pdf.com and launched in 2018. It was a massive amount of upfront work requiring sleepless nights and weekends for months on end because launching a SaaS involves way more than just the software component. Source: almost 4 years ago
It might be easiest to use something like api2pdf.com to convert the HTML to PDF using a simple REST API call instead of trying to wrangle wkhtmltopdf or headless chrome inside serverless functions on Netlify or Google Cloud. That can... Source: over 4 years ago
I built api2pdf.com - there was a massive upfront effort to build the product, infrastructure, marketing, everything you need to create a real business and a reliable, high quality service. Source: over 5 years ago
Tracking HuddleCard since Mar 2021.
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Online group card for birthdays, holidays, and special occasions!
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Pdfcrowd is a Web/HTML to PDF online service. Convert HTML to PDF online in the browser or in your PHP, Python, Ruby, .NET, Java apps via the REST API.
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Let everyone sign a group card online, collect money for a gift or send 1โ1000 eGift Cards in minutes. Loved by over 5 million users. It's fun, fast and super easy!
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