Based on our record, Team2FA seems to be more popular. It has been mentiond 1 time 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.
With that said, depending on your country of origin, you'll have different options. For the US I'd recommend you look at team2fa.com which offers US numbers. For Europe and specifically Germany I'd like to propose you check out Daito (disclosure: I am the founder) since we offer a real, SIM-card based phone number from Germany that works much more reliable than VOIP-based services. Source: 12 months ago
Minimalist - Password manager for iPhone, iPad, Mac, with iCloud Sync
Google Titan - A 2FA device to protect yourself from hackers
One Account - Authentication always has been security or convenience, but why compromise?
Rapid 2FA - A painless way to add two-factor authentication to your site
2FA Authenticator - Simple 2FA Authenticator - Generate Two Factor Authentication tokens.
Clerk SMS for Slack - Send and receive SMS directly in Slack with your team members.