I don't think anybody else has it even this close.
Nobody else is polling likely voters this far out.
Siena has Gilibrand up by 18, which isn't that far off from Gilibrand +11 after the margins of error are taken into account. The difference is not in Gilibrand's support (high 40s to 50 in both polls) but in DioGuardi and the other Republicans (polling in the 30s instead of high 20s). Part of that may be due to fewer undecideds in Rasmussen's polling.
Gilibrand is down 2 and DioGuardi up 10 from Rasmussen's May polling. Blakeman (net +8) and Malpass (net +4) had less of a swing. 5-7 points of that swing come from fewer people choosing "some other candidate".
Siena's trend from mid-May was net DioGuardi +8 - so Rasmussen and Siena aren't that far off.