Sven/Counters

Bad against...

 * effectively takes Sven out of any teamfight.


 * Against her, Sven is barely able to hit Enchantress without using his.


 * can be devastating to Sven's team, as his massive damage can take out a teammate before there is much time to react.


 * Venomancer forces Sven to use his, or be constantly slowed by his poison.
 * Venomancer can be especially hard to deal with in lane, as his damage over time will keep Sven from farming effectively.

Others

 * In general, any hero that can stun, root or slow will give Sven a hard time.
 * and 's AoE blind can keep Sven from landing hits.

Items

 * makes Sven temporarily useless.
 * makes it very hard for Sven to catch up to his targets.

Good against...

 * Anti-Mage is fairly fragile, and cannot stand against Sven in a prolonged fight. will also destroy the illusions from.


 * makes short work of Chaos Knight's s.


 * will devastate Meepo's clones. Against a closely packed group, Sven does not even need to target the clone with the lowest health.


 * cuts through Phantom Lancer's illusions in no time.

Works well with...

 * Crystal Maiden's and numerous slows make it easy for Sven to catch up to enemies.


 * Io's and  sets Sven up for easy ganks anywhere on the map. This is effective against single targets because Sven can burst them down without being disabled by the enemy's teammates.


 * gives Sven plenty of time to beat down the enemy.


 * more than makes up for Sven's low attack speed, allowing him to dish out massive damage.
 * With an, Sven's will also greatly increase Troll Warlord's damage output.

Others

 * In general, any hero with lengthy stuns or roots will synergize well with Sven.

List of heroes that counter Sven, and list of heroes that work well with Sven.