Change lives and influence nations!

What is prayer? Why pray?

Prayer is simply conversing with God. It’s talking with Him, listening to His voice and sometimes just being in His presence.

Communication is essential in any relationship. No communication, no connection. No connection, no relationship. No relationship and you're living on your own…

But living “by prayer”—that’s when things get exciting!

Prayer changes lives. It changes nations. It alters the course of history!

SIM was founded more than 125 years ago through one humble mother’s prayers for Sub-Saharan Africa. Little did she know God would answer through her own family.

Her son later became a missionary to Nigeria and one of the three founding members of SIM. Generations later, millions of people have found physical relief and the hope of Jesus through SIM workers ministering near and far, around the world.

Prayer changes things. Prayer changes us. Would you join us in living by prayer?

Charlie Thorsen
Director of Prayer and Celebration, SIM USA

"I am the vine; you are the branches. If you remain in me and I in you, you will bear much fruit; apart from me you can do nothing."
John 15:5 (NIV)

Become a SIM Prayer Partner

God is already moving.

It’s simply our privilege to join Him in His work through prayer.

That’s why SIM’s motto is “By Prayer.”

When you partner with SIM as a prayer partner, you become a part of God’s life-changing work around the world.

Here are the three easy steps to becoming a SIM Prayer Partner:

1. Sign up using the form below.
2. Begin receiving SIM prayer and ministry updates from around the world.
3. Pray as God leads.

Make a Difference Through Prayer

Did you know that in addition to raising financial support, each SIM worker must raise 200 prayer partners? That means every couple or family must find 400 partners committed to interceding on their behalf.

This is how much SIM values prayer. It is essential. You are essential!

Without your active prayer participation, we see burnout. We see roadblocks. We see stalled or derailed action. We see the enemy making headway.

With you and by your prayers, we see lives changing. We see Jesus overthrow strongholds. We see miracles. We see victory over death!

SIM Friend, God sees you. He hears you. And He wants to use you to accomplish His good and perfect plans.

You matter. And your prayers move mountains.

Become a SIM Prayer Partner today! Simply use the form below.

Sign up to be a SIM Prayer Partner. It's easy!

You'll begin receiving SIM prayer and ministry updates from around the world. You may also call the SIM USA headquarters (1-800-521-6449) to request SIM prayer resources.

Pray / Give / Go

SIM’s motto is “By Prayer,” but when you sense God leading you to go beyond the call to pray, you may wish to GO or GIVE. See below for more information.


Every single gift the Lord provides is a blessing. Know that your gift will be put to use right away responding to physical needs and sharing the hope of the gospel with people in hard places around the world.



Is God calling you to serve as a missionary? We have thousands of openings right now and help is urgently needed. Whether you’re looking to serve in a long-term role or take your first steps toward discovering God’s will for you, we would love to hear from you.


“Trust in him at all times, you people; pour out your hearts to him, for God is our refuge.” — Psalm 62:8 (NIV)