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Radius.to VS Protocol Deviation

Compare Radius.to VS Protocol Deviation and see what are their differences

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Radius.to logo Radius.to

Build real-world communities and find things happening around you. A Meetup and Eventbrite alternative.

Protocol Deviation logo Protocol Deviation

eClinical platform for clinical trials
  • Radius.to Radius
    Radius //
    2026-08-24
  • Radius.to Radius - Landing Page
    Radius - Landing Page //
    2026-08-24
  • Radius.to Radius - Event Page
    Radius - Event Page //
    2026-08-24
  • Radius.to Radius - Group Page
    Radius - Group Page //
    2026-08-24
  • Radius.to Group Search
    Group Search //
    2026-08-24
  • Radius.to Event Details
    Event Details //
    2026-08-24
  • Radius.to Activity feed
    Activity feed //
    2026-08-24
  • Radius.to User dashboard
    User dashboard //
    2026-08-24
  • Radius.to Group map
    Group map //
    2026-08-24

Radius is a free, modern alternative to Meetup and Eventbrite. Create groups, host events, and find communities nearby — no ads, no algorithms, no organiser fee for groups up to 50 members.

  • Beautiful group and event pages, set up in minutes
  • RSVPs, waitlists, recurring events, and guest checkout (no account needed)
  • Discussions, messaging, calendar feeds, and member exports
  • Search and map discovery, plus automatic listing on Google Events
  • Joining and attending is always free. 500+ communities, 3,000+ events, 120+ cities.
  • Protocol Deviation Landing page
    Landing page //
    2022-11-18

Radius.to features and specs

  • Event API
    Create events in your group via our free API
  • RSVP
    Allow users to RSVP to events
  • User accounts
    Create your profile, join groups, and RSVP to events.
  • Discoverability
    Be found more easily, and find groups which interest you.
  • Quick event creation
    Quick create - copy metadata from previous events
  • Event status & visibility
    Make use of flexible event modes like draft and unlisted.
  • Group invitations
    Easily migrate from other platforms by mass inviting users.
  • Export data
    Export emails of event attendees and group members, or a full data export of your group
  • External tickets
    Add a ticket button to your event if you want to add external ticketing
  • Event attendance limits
    Automatically shut off RSVPs.
  • Private groups
    Private Groups for organizers on Pro
  • Group theme
    Change your group and event page colours
  • Related groups
    Link related groups and form a network to allow your group to be found by others more easily

Protocol Deviation features and specs

No features have been listed yet.

Analysis of Radius.to

Overall verdict

  • Radius.to is a URL shortening and link management service that offers basic functionality for creating shortened links, though it lacks the advanced features and brand recognition of major competitors like Bitly.

Why this product is good

  • Provides simple, straightforward URL shortening functionality
  • Free to use for basic link shortening needs
  • Generates quick, compact links suitable for sharing
  • Low barrier to entry with no complex setup required

Recommended for

  • Users who need occasional, basic link shortening without advanced analytics
  • Casual users sharing links on social media or in messages
  • Individuals looking for a free, no-frills URL shortener
  • Not ideal for businesses needing detailed click tracking, custom branding, or enterprise-level link management

Analysis of Protocol Deviation

Overall verdict

  • Protocol Deviation appears to be a niche resource focused on clinical trial and research compliance topics, which can be valuable for those in the industry, though independent verification of its authority, accuracy, and update frequency is recommended before relying on it for critical decisions.

Why this product is good

  • Focuses on a specialized topic (protocol deviations in clinical research) that is often underserved by general resources
  • May offer practical guidance for handling deviations, documentation, and regulatory compliance
  • Can serve as a convenient reference point for clinical research professionals seeking quick information

Recommended for

  • Clinical research coordinators and associates managing trial compliance
  • Regulatory affairs and quality assurance professionals in life sciences
  • Sponsors, CROs, and site staff needing guidance on documenting and reporting protocol deviations
  • Students or newcomers learning about Good Clinical Practice (GCP) and trial management

Radius.to videos

No Radius.to videos yet. You could help us improve this page by suggesting one.

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Protocol Deviation videos

+ Add

Protocol Deviations

More videos:

  • Review - What Is A Protocol Deviation?
  • Review - The Differences Between Protocol Deviations and Violations In Clinical Research Both Minor and Major

Category Popularity

0-100% (relative to Radius.to and Protocol Deviation)

Radius.to

Protocol Deviation

Event Management
100 100%
Event Management
0% 0
Clinical Trial Management System
0 0%
Clinical Trial Management System
100% 100
Community Platform
100 100%
Community Platform
0% 0
Clinical Trials
0 0%
Clinical Trials
100% 100

Questions & Answers

As answered by people managing Radius.to and Protocol Deviation.

What makes your product unique?

Radius.to's answer

An alternative to Meetup, with a free plan. Control your group data with easy export.

User comments

Share your experience with using Radius.to and Protocol Deviation. For example, how are they different and which one is better?
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Social recommendations and mentions

Based on our record, Radius.to seems to be more popular. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Radius.to mentions (2)

  • Ask HN: What Are You Working On? (February 2026)
    Https://radius.to/ - a Meetup.com alternative of sorts - with fairer organiser pricing for smaller groups. I posted a Show HN [1] here a while back, got tons of great feedback, and have been slowly improving it since, with little marketing. Planning a re-launch here soon. [1] https://news.ycombinator.com/item?id=40717398. - Source: Hacker News / 7 months ago
  • Ask HN: How are you acquiring first 100 users?
    It's easier said than done, I suppose, but my first ~500 users for https://radius.to/ were from HN after hitting the front page. I'd imagine you'd get pretty good results on both ProductHunt and Reddit as well if you can get enough upvotes, though the latter is pretty difficult to promote your products on these days unless it's legitimately relevant to the community you post in. - Source: Hacker News / over 1 year ago

Protocol Deviation mentions (0)

We have not tracked any mentions of Protocol Deviation yet. Tracking of Protocol Deviation recommendations started around May 2021.

What are some alternatives?

When comparing Radius.to and Protocol Deviation, you can also consider the following products

Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.

Eventbrite - Discover Great Events or Create Your Own & Sell Tickets

Facebook Events - Facebook Events enables businesses to organize gatherings, manage invitations and send notifications and reminders to their audience.

Agentset.ai - The open-source RAG platform. Fully performant and with agentic superpowers.

TicketSource - Free, easy to use online ticketing for your events.

Mobilizon - A free and federated tool to get our events off Facebook

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