Custos vs Superinbox Comparison in 2025

Custos

Learn More | Visit Site

Custos helps you reply to emails in seconds by creating drafts that sound like you and include the right context. It lives inside your inbox, learns from your past emails, and writes replies that are fast, personal, and accurate.

Superinbox

Learn More | Visit Site

Reclaim your time with Superinbox AI. Get personalized, context-aware email drafts & intelligent inbox organization for Gmail & Outlook.

Custos

Launched	2024-03
Pricing Model	Freemium
Starting Price	$9.99 mo/user
Tech used
Tag	Email Generators,Email Management,Task Automation

Superinbox

Launched	2009-02
Pricing Model	Freemium
Starting Price	$25/month
Tech used
Tag

Custos Rank/Visit

Global Rank	4074733
Country	United States
Month Visit	5000

Top 5 Countries

50.97%

36.55%

11.02%

1.45%

United States Spain Mexico Colombia

Traffic Sources

4.29%

0.93%

0.06%

4.44%

45.09%

45.03%

social paidReferrals mail referrals search direct

Superinbox Rank/Visit

Global Rank
Country
Month Visit

Top 5 Countries

Traffic Sources

Estimated traffic data from Similarweb

What are some alternatives?

When comparing Custos and Superinbox , you can also consider the following products

Jace - Save time and write emails effortlessly with Jace AI—your personal email assistant. Craft responses in your voice, schedule meetings seamlessly, and stay organized.

Writemail - WriteMail.ai: AI email assistant. Write professional, clear emails faster. Save time, improve communication, and master your inbox effortlessly.

CXassist - Personalized, Al-Powered Email Responses to Boost Efficiency, Nurture Clients, and Transform Your Customer Experience!

Cadabra - Using GPT 4.0 AI , Cadabra learns your tone and crafts email replies in seconds with perfect grammar.