Learn how to counter and when to pick Io from our list of counters and matchups updated for the current meta.
| Hero | DisadvantageDis. | Hero Win Rate | |
|---|---|---|---|
 | Troll Warlord | 4.11% | 46.24% |
 | Ancient Apparition | 3.19% | 45.50% |
 | Underlord | 2.98% | 46.37% |
 | Sven | 2.57% | 52.49% |
 | Dark Willow | 2.48% | 49.09% |
| Hero | AdvantageAdv. | Hero Win Rate | |
|---|---|---|---|
 | Oracle | 3.06% | 51.20% |
 | Spectre | 2.90% | 50.70% |
 | Night Stalker | 2.75% | 50.21% |
 | Brewmaster | 2.65% | 53.49% |
 | Arc Warden | 2.41% | 51.88% |
| Hero | DisadvantageDis. | IoHero Win Rate | Matches Played | |
|---|---|---|---|---|
| Troll Warlord | 4.11% | 46.24% | 12,749 |
| Ancient Apparition | 3.19% | 45.50% | 23,279 |
| Underlord | 2.98% | 46.37% | 8,675 |
| Sven | 2.57% | 52.49% | 7,618 |
| Dark Willow | 2.48% | 49.09% | 19,027 |
 | Luna | 2.28% | 52.25% | 16,110 |
 | Windranger | 2.23% | 55.18% | 16,980 |
 | Naga Siren | 2.20% | 52.86% | 3,316 |
 | Winter Wyvern | 2.14% | 48.36% | 10,658 |
 | Marci | 2.12% | 48.87% | 19,124 |
 | Kunkka | 2.10% | 50.25% | 11,320 |
 | Chen | 2.10% | 55.41% | 1,801 |
 | Primal Beast | 2.02% | 51.61% | 8,453 |
 | Elder Titan | 1.84% | 47.00% | 5,866 |
 | Mars | 1.82% | 50.96% | 18,229 |
 | Disruptor | 1.82% | 48.54% | 17,494 |
 | Earthshaker | 1.82% | 49.53% | 57,500 |
 | Gyrocopter | 1.81% | 50.60% | 14,065 |
 | Leshrac | 1.78% | 49.32% | 6,513 |
 | Faceless Void | 1.71% | 53.15% | 17,110 |
 | Monkey King | 1.66% | 53.56% | 20,802 |
 | Batrider | 1.64% | 55.39% | 5,734 |
 | Techies | 1.57% | 52.24% | 29,463 |
 | Venomancer | 1.48% | 49.19% | 20,414 |
 | Phantom Lancer | 1.37% | 51.01% | 11,559 |
 | Crystal Maiden | 1.36% | 48.41% | 40,604 |
 | Jakiro | 1.33% | 48.96% | 34,007 |
 | Dragon Knight | 1.33% | 49.91% | 28,945 |
 | Slardar | 1.31% | 50.06% | 17,337 |
 | Shadow Fiend | 1.28% | 51.77% | 61,293 |
 | Undying | 1.22% | 47.37% | 23,268 |
 | Magnus | 1.18% | 50.94% | 33,181 |
 | Doom | 1.17% | 52.96% | 12,018 |
 | Lich | 0.92% | 44.39% | 53,470 |
 | Omniknight | 0.88% | 50.70% | 5,708 |
 | Viper | 0.87% | 49.99% | 22,198 |
 | Sand King | 0.81% | 49.54% | 17,843 |
 | Witch Doctor | 0.80% | 48.03% | 56,997 |
 | Lycan | 0.78% | 48.98% | 7,531 |
 | Keeper of the Light | 0.78% | 52.04% | 6,602 |
 | Snapfire | 0.77% | 53.54% | 12,467 |
 | Weaver | 0.76% | 51.37% | 19,350 |
 | Mirana | 0.76% | 54.35% | 11,160 |
 | Kez | 0.73% | 50.45% | 27,968 |
 | Hoodwink | 0.71% | 53.46% | 32,569 |
 | Vengeful Spirit | 0.70% | 48.74% | 27,489 |
 | Lina | 0.68% | 50.11% | 56,980 |
 | Tiny | 0.68% | 51.75% | 21,224 |
 | Terrorblade | 0.62% | 52.63% | 14,965 |
 | Dazzle | 0.61% | 51.83% | 30,936 |
 | Broodmother | 0.60% | 49.53% | 13,708 |
 | Razor | 0.60% | 49.16% | 17,713 |
 | Bristleback | 0.58% | 50.82% | 31,484 |
 | Enigma | 0.47% | 50.35% | 13,949 |
 | Alchemist | 0.46% | 49.94% | 22,356 |
 | Medusa | 0.45% | 47.94% | 23,270 |
 | Drow Ranger | 0.43% | 49.08% | 49,080 |
 | Chaos Knight | 0.43% | 50.53% | 13,573 |
 | Muerta | 0.41% | 52.21% | 10,436 |
 | Pangolier | 0.41% | 53.82% | 7,185 |
 | Dawnbreaker | 0.38% | 48.27% | 21,893 |
 | Huskar | 0.34% | 51.75% | 17,209 |
 | Treant Protector | 0.33% | 51.66% | 10,285 |
 | Slark | 0.33% | 50.57% | 26,699 |
 | Sniper | 0.31% | 51.53% | 57,158 |
 | Grimstroke | 0.29% | 51.22% | 15,135 |
 | Death Prophet | 0.20% | 51.17% | 7,635 |
 | Ringmaster | 0.19% | 52.49% | 11,015 |
 | Ursa | 0.18% | 51.12% | 28,196 |
 | Tusk | 0.07% | 54.22% | 18,075 |
 | Spirit Breaker | 0.03% | 49.21% | 38,771 |
 | Ogre Magi | 0.02% | 49.15% | 49,292 |
 | Bounty Hunter | 0.01% | 49.47% | 20,761 |
 | Phantom Assassin | -0.04% | 50.00% | 62,861 |
 | Warlock | -0.05% | 47.31% | 24,322 |
 | Beastmaster | -0.06% | 53.53% | 10,576 |
 | Legion Commander | -0.12% | 47.74% | 54,626 |
 | Lion | -0.28% | 50.94% | 84,823 |
 | Ember Spirit | -0.28% | 53.07% | 10,952 |
 | Riki | -0.31% | 49.66% | 17,577 |
 | Axe | -0.35% | 48.21% | 53,952 |
 | Tidehunter | -0.50% | 50.05% | 17,412 |
 | Shadow Shaman | -0.50% | 48.09% | 42,646 |
 | Lone Druid | -0.57% | 49.35% | 6,482 |
 | Silencer | -0.62% | 48.07% | 24,731 |
 | Skywrath Mage | -0.62% | 51.02% | 23,882 |
 | Rubick | -0.67% | 53.92% | 51,853 |
 | Templar Assassin | -0.67% | 56.60% | 16,676 |
 | Outworld Destroyer | -0.75% | 49.01% | 15,212 |
 | Timbersaw | -0.77% | 52.44% | 26,417 |
 | Clockwerk | -0.80% | 48.62% | 22,421 |
 | Phoenix | -0.82% | 50.93% | 18,107 |
 | Earth Spirit | -0.86% | 52.53% | 12,955 |
 | Nature's Prophet | -0.88% | 56.22% | 24,533 |
 | Queen of Pain | -0.89% | 52.37% | 33,137 |
 | Dark Seer | -0.90% | 51.53% | 4,588 |
 | Morphling | -0.91% | 53.16% | 35,798 |
 | Pudge | -0.92% | 50.41% | 87,634 |
 | Storm Spirit | -0.93% | 51.34% | 23,397 |
 | Invoker | -0.96% | 53.14% | 57,317 |
 | Meepo | -1.05% | 52.87% | 6,217 |
 | Necrophos | -1.18% | 48.60% | 33,767 |
 | Pugna | -1.18% | 52.99% | 14,681 |
 | Nyx Assassin | -1.24% | 50.90% | 24,180 |
 | Shadow Demon | -1.25% | 53.48% | 10,689 |
 | Clinkz | -1.26% | 51.49% | 14,181 |
 | Juggernaut | -1.30% | 49.51% | 47,216 |
 | Puck | -1.36% | 52.97% | 22,288 |
 | Enchantress | -1.36% | 54.67% | 9,210 |
 | Abaddon | -1.38% | 45.97% | 25,599 |
 | Centaur Warrunner | -1.39% | 50.61% | 16,359 |
 | Bane | -1.47% | 52.25% | 6,911 |
 | Tinker | -1.47% | 54.04% | 10,613 |
 | Void Spirit | -1.55% | 50.25% | 11,482 |
 | Zeus | -1.65% | 51.02% | 37,221 |
 | Wraith King | -1.69% | 48.42% | 32,982 |
 | Anti-Mage | -2.12% | 52.47% | 38,312 |
 | Visage | -2.30% | 50.63% | 8,643 |
 | Lifestealer | -2.38% | 50.22% | 21,164 |
 | Bloodseeker | -2.41% | 49.86% | 12,359 |
| Arc Warden | -2.41% | 51.88% | 14,916 |
| Brewmaster | -2.65% | 53.49% | 2,937 |
| Night Stalker | -2.75% | 50.21% | 17,617 |
| Spectre | -2.90% | 50.70% | 46,981 |
| Oracle | -3.06% | 51.20% | 13,948 |
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