How to counter Sniper

In game

• Spectre
  WHY?• Sniper is a very immobile hero that likes to shoot from a safe distance. All Spectre has to do is press Haunt.
• Spirit Breaker
  WHY?• If ever Sniper shows up on the map, Charge of Darkness can threaten a kill due to his low mobility and strength.
• Nyx Assassin
  WHY?• Sniper has low HP and he can easily die to a Nyx Assassin stalking him. • Nyx Assassin can walk in the Shrapnel with Spiked Carapace to stun Sniper.
• Centaur Warrunner
  WHY?• Sniper is a very immobile hero and Centaur Warrunner makes everyone in his team mobile with Stampede. • Most games Sniper will kill himself to Retaliate before killing Centaur Warrunner. • Centaur Warrunner likes to buy Blink Dagger and can easily jump Sniper to Hoof Stomp him.
• Zeus
  WHY?• Zeus can set up kills and reveal Sniper with his Thundergod's Wrath and Nimbus.
• Lycan
  WHY?• Sniper cannot do anything once Lycan starts running at him with Shapeshift. • Summon Wolves can scout Sniper across the map and even threaten a kill along with Howl and the Helm of the Dominator creep.
• Clockwerk
  WHY?• Hookshot is a great long range initiation that can catch Sniper. • Rocket Flare can reveal Sniper playing in the back. • Power Cogs and Battery Assault really punish a Sniper that hasn't bought Force Staff or Aghanim's Shard.
• Pudge
  WHY?• Sniper is a very immobile hero which means he is an easy target for ganks and Meat Hook. • Pudge likes to buy Blink Dagger and can easily jump Sniper to Dismember him. • Meat Shield can provide a good damage block to Sniper's attacks.