Prefix is a Must-Have Tool for Code Diagnostics

Prefix is a powerful, but lightweight developer tool that displays
application data on your workstation while you code.

Logs + Errors + Queries + Much More…

For ASP.NET and Java Applications | Learn More

Detailed Trace of Every Web Request

Requires No Config or Code Changes

Runs Fast and is Always Ready

@stackify's #prefix.io is like getting a new prescription for glasses. I feel like I see everything. #DevNirvana

So awesome, #Prefix helped us find sneaky performance issues within 5 minutes of getting things up and running. #awesomesauce

Sorry Glimpse I have removed you in place of @Stackify's Prefix offering. No more project dependencies!

GetApp/Capterra

Prefix is a powerful, lightweight code profiler:

Hidden error identification
Integrated log statements
Client-side JavaScript performance
Performance & usage insights of SQL queries, web service calls, caching, queuing, and more!

Download Prefix free!

Get it running in 3 simple steps:

Submit the form on the left.
Download and install Prefix.
See app performance insights in minutes!

Tour Prefix in 90 Seconds

Watch Prefix Illuminate Code Issues

Immediate Download. Instant Code Insights.

Prefix shows developers and their teams what their code is doing and why.

View Your Logs by Request

Stop sorting through messy log files. See the exact log messages for a single web request.

Find Hidden Exceptions

Prefix can instantly show you all the exceptions hidden in your code.

Quickly Spot Suspicious Behaviors

People see things with Prefix they never expected. Why does that web request do 38 database calls?

View SQL Queries

Including SQL parameters, affected records and how long it took to download the result set.

Want More?!

Expand Prefix’s Capability and Visibility

Prefix Premium adds powerful functionality and the ability to deploy with greater confidence.

Local
Workstations

Prefix Free includes:

Performance and usage insights of SQL queries, web service calls, caching, queuing, and much more!

Hidden app error identification

Log statements Client-side

JavaScript performance

Remote
QA, Test, Staging

Prefix Premium adds:

Trace and comparison views of app performance in remote environments like QA & production

Smart suggestions to track any method in your code

Code-level performance tracking

Performance reporting & dashboards

Server & application metrics

Log searching & monitoring

Error tracking & monitoring

Alerts & notifications

Out of the box compatibility with ASP.NET and Java apps, as well as loads of third party libraries. When you tie Retrace to Prefix, you bridge critical gaps and cover the entire development life cycle.

Prefix Premium is only $15/month. Includes 1 workstation + 1 pre-prod server (Retrace)