
Opinew is a social proof plugin which will increase your Shopify store's conversion rates and revenue. Opinew not only offers email reviews but also SMS and printed reviews which can be very beneficial for small-business owners. Fera does not have such features. Moreover, you might be limited in the number of new reviews you can submit through Fera, which is a drawback.
Fera
Fera tracks customer reviews and provides social proof to businesses. It comes with a configurable interface and easy-to–use widgets. It powers more that 10,000 businesses. Fera is a vital tool in your marketing campaign, whether you are an online store owner or looking to improve conversion rates. Fera is not without its advantages. However, there are some disadvantages you should be aware before you use it.
You can't expect a high rate of conversion if you rely only on old traffic. Fera allows you to add testimonials. You can also create photo walls. You can also track the number and order history of your new customers, which will improve sales.

Nudgify
Nudgify is a great software tool that gives real-time social proof for purchases. This tool is compatible with hundreds if not all platforms. It will show customers what others have to say about your products or services. It also provides engagement, reducing cart abandonment rates. The trial is free and comes with a 20% discount. There are also four pricing plans.
Nudgify automatically gathers social evidence from your website's visitors. You can integrate it to other apps and add forms directly to your site. Fera is another app you can integrate into your site. You can use it to display your social proof and reviews. This makes it easier for your online shop to earn trust from potential clients.
Opinew
Shopify stores use Opinew to help them build social proof. It boosts revenues and increases conversion rate. Users can also ask their customers to review products. Opinew allows customers to send reviews via email and SMS. Fera however only allows you to send reviews requests via email. This limitation can limit your ability to add new reviews to your site.
Fera combines 10+ social proof apps into one application. Integration of all of these apps gives users social proof to increase new buyer confidence. It also allows you import product reviews directly from popular online marketplaces.

Referral Candy
Referral Candy is an online referral program that helps businesses grow their brand by rewarding customers for spreading the word about their products and services. There are many rewards available, including unique gifts and coupons. The platform is highly customizable and does not require any coding knowledge. It allows merchants to set their own rewards and does not limit advocates or redemptions. It also features social logins which allow businesses and customers to communicate on a personal level.
Fera tracks product sales and displays customer reviews and testimonials on product pages. Users can also run A/B testing and optimize their campaigns to convert more customers. There are three plans you can choose from. For more advanced features you can choose between the Medium ($99/month), and Large ($199/month).