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Technical requirements

The content of the article

Compatible OS
Compatible browsers
Compatible mobile devices
Compatible tablet devices
Adaptive broadcasting
Hardware setup checking
Connection speed
Firewall settings
Emails delivery

Compatible OS

The event presenters and attendees can use all well-known OS like macOS, iPadOS, iOS, Microsoft Windows, Linux and Chrome OS. We have tested our platform on all of them. Our only limitation is that Linux users cannot share screens and use our secure TCP-based alternative broadcasting technology.

The list of the compatible OS:
OSReal-time streamingDelayed streaming up to +8-15 sec
MacOS 10.6+✔️✔️
OS X 10.8+✔️✔️
macOS 10.12+✔️✔️
iOS 12+✔️✔️
iPadOS 13.1+✔️✔️
Windows 7+✔️✔️
Ubuntu 14.04+✔️✔️
Chrome OS✔️✔️

Linux version of our downloadable plugin will be available soon.

Compatible browsers

Your attendees will be able to join your events on all major browsers including Safari, Microsoft Edge, Mozilla Firefox, Google Chrome, and Opera.

We strongly recommend using Google Chrome or any Chromium-based version like Brave for all our presenters. But our software is successfully tested and properly works with Safari 12.1+, Mozilla Firefox, Opera, and Microsoft Edge 79+.

The second recommendation is that all presenters who speak at the same time MUST have the same browser version, like all use Google Chrome or Mozilla Firefox. It will allow the presenters to avoid microphone echo when they speak together just because the same version has a suitable echo cancellation mechanism between each other.

But in any case, we still encourage you to use Google Chrome for a presenter who speaks during an online event. Indeed, Chrome assures that the quality of the stream you send out stays stable thanks to a technology called «simulcast». In addition, it ensures overall stability to carry out your session without any connectivity issues through UDP-based WebRTC protocol or our downloadable TCP-based plugin.

We recommend you use a desktop or laptop computer to broadcast your webcam, microphone and screen. And the same goes for anyone you invite to the event to share their presentation, screen, webcam, or microphone. However, as we mentioned above, you can use any version of mobile or tablet devices to join the event and share your webcam, microphone, screen or presentation.

But it would help if you still remembered that, in any case, attendees can still experience an up to 10-second delay due to browser or device limitations.

The list of the compatible browsers:
BrowserReal-time streamingDelayed streaming up to +8-15 sec
Safari 12+✔️✔️
Firefox 71+✔️✔️
Microsoft Edge 79+✔️✔️
Chrome 60+✔️✔️
Opera 60+✔️✔️

If you are on Chrome <60, Firefox <71, and Opera<60, make sure to update your browsers, or you will not be able to access the events room.

Compatible mobile devices

We have optimized our webinar software to work on any mobile device, including iPhone and Android.

As a presenter or attendee, to join the event via mobile, make sure to use your iPhone with OS version at least iOS 12.2 with Safari or your Android device with Google Chrome browser.

We do not provide mobile applications for a straightforward reason: everything works out of the box in your favourite browser on your mobile device. So we just tried to make our platform as responsive as possible to support small screens.

The list of compatible mobile devices:
DeviceReal-time streamingDelayed streaming up to +8-15 sec
iOS 12.2+ with Safari browser✔️✔️
iOS 12.2+ with a non-Safari browser✔️✔️
iOS 14.3+ with Chrome & Firefox✔️✔️
iPadOS 13.1+✔️✔️

Compatible tablet devices

We also have optimized our webinar software to work on any tablet device, including iPad and Android tablets.

As a presenter or attendee, to join the event via tablet, make sure to use your iPad with OS version at least iOS 13.1 with Safari or your Android tablet with Google Chrome browser.

We do not provide tablet applications for a straightforward reason: everything works out of the box in your favourite browser on your tablet device.

The list of compatible tablet devices:
DeviceReal-time streamingDelayed streaming up to +8-15 sec
iPadOS 13.1+ with Safari browser✔️✔️
iPadOS 13.1+ with a non-Safari browser✔️✔️

Adaptive broadcasting

We have our version of the adaptive broadcasting protocol with full compatibility mode to ensure that all attendees get audio and video playback on any network, device, and browser.

It's automatically turned on for all instant rooms or events.

Our adaptive broadcasting protocol is not based on WebRTC protocol and successfully works through one TCP port 443 in most cases.

It allows us to deliver video and audio streams from presenters to attendees, even in corporate networks with UDP protocol blocked or through the most well-known VPNs.

The only inconvenience we know is that stream latency can grow to 10 seconds but be stable and continuous like usual.

Hardware setup checking

If you are planning to host an event and be a speaker, we suggest you check your setup beforehand.

Thanks to our technical scan, you can quickly check your hardware setup (internet connection, browser, ports, devices etc.).

You can run the system check here:

Just know you must have green ✔️ in the last step as a good result.

If this is not the case, you might encounter network instabilities or non-working devices like a webcam or microphone during the event.

Try using a different network or browser or another method for connecting, like Ethernet over Wi-Fi, and also, please check out the below section.

And below, we show you the excellent system check result which allows hosting events successfully.

Step #1: Starting the hardware check

Step #2: Checking necessary opened ports and available protocols

Step #3: Checking connectivity and the Internet speed

Step #4: Checking the webcam

Step #5: Checking the microphone

Step #6: Checking the speaker's volume level

Step #7: All steps must be green ✔️ as a good result

Few words about necessary connection speed

A minimum of 256 Kbps per upstream and downstream speed is necessary to join the instant room or scheduled event.

At the same time, as a presenter, we recommend you have at least 5 Mbps upstream for optimal results.

As an attendee, we recommend 2 Mbps downstream for an optimal experience.

Please note:
Our webinar software will downgrade your video quality first and prioritise the audio if you don't have enough bandwidth.

The test above is from our office, which has a pretty good download speed. Our upload speed is good but not incredible but at the same time enough to send a good video and audio stream.

As a presenter or attendee, you must understand that your connection speed is not the only factor. You have to also look for connection stability, aka the number of people connected to that connection. The connection stability will impact the number of packets lost during a live session and jitter. Therefore, try to use Ethernet over Wi-Fi and ask your family or team not to saturate the network.

Also, remember, then old a desktop, laptop, mobile or tablet you have, then many other factors like CPU or HDD speed will influence your event experience.

Firewall settings

Our webinar software works with WebRTC protocol, a relatively new technology that might require network configuration within larger companies with secure firewalls.

Here is the stuff you will need to check with your IT department:

Whitelist the following domains:


Whitelist the following ports:

UDP ports 1025 - 65535
TCP ports 80 and 443

UDP is highly recommended over TCP for better quality audio and video. However, the protocol favours timeliness over reliability which is consistent with human perceptive preferences, where we can fill in gaps but are sensitive to time-based delays. For the best possible experience, we recommend opening UDP ports 1025 - 65535.

At the same time, as we mentioned above, if you have a secure corporate network or necessary security requirements or your company uses a corporate VPN, we strongly recommend installing our downloadable TCP-based plugin. It allows you to avoid the problems above with jitter and lost audio fragments. Plus, you will get additional settings if you need meditations or music-quality streams.

Emails delivery

We recommend that your email provider or email management system authorizes the below domain names to ensure the delivery of emails being sent by our webinar platform:

Once you're done with the settings, you should be good to go!

However, in case you run into any issues, here are some troubleshooting tips & tricks:

As a presenter:

First run tests here: and send us the results through support widget;
If the video stream from your webcam does not start loading after a while, your router settings might be blocking the video stream. Try to restart your home router and computer. Or ask your IT to unblock web-sockets protocol wss://, the WebRTC protocol and the 443 ports for video streaming. See the section above, "Firewall settings".

As an attendee:

If you cannot watch or hear the event: turn off the presenter's webcam;
If the issues persist, please do a system check here and send us the results to the online support;
If the problem persists, ask your IT to unblock web sockets, the 443 ports for video streaming, the WebRTC protocol, and UDP ports 1024-65535. See the "Firewall settings" section for a more detailed explanation;
In the meantime, try joining from a different network, like a 3G/LTE mobile network.

Updated on: 17/05/2024

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