Navy SEALs vs Delta Force: What's the Difference?

The Navy SEALs are the U.S. Navy's special operations force. Delta Force is a U.S. Army special-mission unit. The SEALs are a large community of teams under U.S. Special Operations Command through Naval Special Warfare Command. Delta Force is a small, screened unit under the Joint Special Operations Command (JSOC), a sub-unified command of USSOCOM.

One detail causes most of the confusion. People often compare "the SEALs" to Delta, but the closest Navy match to Delta is not the broad SEAL teams. It is DEVGRU (the Naval Special Warfare Development Group, originally SEAL Team Six), which sits under JSOC alongside Delta. The broad SEAL teams sit one level out, under Naval Special Warfare Command.

The two forces are organized very differently.

• Navy SEALs: a Navy force. The numbered SEAL teams report through Naval Special Warfare Command, the Navy component of USSOCOM, headquartered in Coronado, California. You can see the individual teams in the GovCharts data — for example SEAL Team 1 and SEAL Team 2.
• Delta Force: an Army unit, officially the 1st Special Forces Operational Detachment-Delta (1st SFOD-D). It reports to JSOC and is based at Fort Bragg, North Carolina. See the Delta Force page.
• DEVGRU: the Navy's JSOC unit, the direct counterpart to Delta. Based at Dam Neck, Virginia. See the DEVGRU page.

So at the JSOC level, the Army has Delta and the Navy has DEVGRU. The wider SEAL community is a separate, larger structure.

You will often read that both Delta and the SEALs are "Tier 1." That label is an informal, open-source term used in media and books. It is not an official Department of Defense classification, and the military does not publish a tier list.

In the informal scheme GovCharts uses to organize units, the special-mission units — Delta and DEVGRU — are grouped as the top JSOC tier, while the broad SEAL teams and the Army Special Forces (Green Berets) sit in the wider USSOCOM tier. The point of the comparison is not a ranking of who is "better." It reflects mission and command: Delta and DEVGRU are screened, low-profile units assigned to JSOC, and the SEAL teams are a larger maritime special operations force.

Both forces conduct direct action, special reconnaissance, and counterterrorism. The emphasis differs.

• Navy SEALs specialize in maritime and coastal operations — sea, air, and land, which is what the name stands for. They deploy from ships, submarines, and small craft, and the numbered teams carry regional focuses across the globe.
• Delta Force is one of the Army's principal counterterrorism and hostage-rescue units. It was created in 1977 by Colonel Charles Beckwith, who modeled it on Britain's Special Air Service (SAS).
• DEVGRU performs the maritime side of the same special-mission mission set under JSOC, which is why it is the natural comparison to Delta rather than the broad SEAL teams.

The pipelines differ in who can enter and how candidates are assessed.

• Navy SEALs (BUD/S): the SEALs recruit directly from new enlistees and the fleet. Candidates attend Basic Underwater Demolition/SEAL (BUD/S) training in Coronado, a roughly six-month course built around "Hell Week." BUD/S is designed around team performance under stress.
• Delta Force (Assessment and Selection): Delta does not take civilian recruits. It draws experienced soldiers, historically from the Army Special Forces and the Ranger Regiment, then runs them through a multi-week Assessment and Selection course followed by a roughly six-month Operator Training Course. A&S emphasizes solo land navigation and individual judgment when isolated and exhausted.
• DEVGRU: recruits from SEALs who have already completed BUD/S and served in the teams, then runs its own additional screening — a second selection on top of becoming a SEAL.

Is Delta Force harder than the SEALs?
There is no official ranking. Both pipelines are extremely selective with high attrition. They test different things: BUD/S stresses team endurance, while Delta's Assessment and Selection emphasizes solo land navigation and individual judgment. Delta also requires prior military experience, so its candidates are already seasoned soldiers, not new recruits.

Can a Navy SEAL join Delta Force?
It is uncommon but not barred. Delta historically recruits from across the Army, mainly Special Forces and Rangers, and Delta is an Army unit. A SEAL is in the Navy, so a sailor would face an unusual cross-branch path. In practice, SEALs who want a special-mission unit typically screen for DEVGRU, the Navy's JSOC counterpart to Delta.

What's the difference between the SEALs and DEVGRU?
DEVGRU, originally SEAL Team Six, is the Navy's special-mission unit under Joint Special Operations Command. The broad SEAL teams sit under Naval Special Warfare Command. DEVGRU recruits from experienced SEALs through a second selection, which is why it, not the wider SEAL teams, is the direct counterpart to Delta Force.

Are Navy SEALs and Delta Force both Tier 1?
"Tier 1" is an informal, open-source media term, not an official Department of Defense classification. In that informal usage, the special-mission units — Delta and DEVGRU — are grouped at the top JSOC tier, while the broad SEAL teams are usually placed one level out under Naval Special Warfare Command.