| Organizations performing similar types of work |
| Id | Name | Address | State | Established | Total Income |
| 1 | Appalachian Mountain Club | 5 Joy St, Boston, MA 02108-1403 | MA | 1934-08 | $23,181,907 |
| 2 | Thompson Island Education Center Inc | PO BOX 127, South Boston, MA 02127-0002 | MA | 1951-05 | $190,388 |
| 3 | Cushing Nature And Preservation Center | Boston, MA 02115 | MA | | $93,983 |
| 4 | Natures Classroom Inc | 19 Harrington Rd, Charlton, MA 01507-5234 | MA | 1977-10 | $8,554,226 |
| 5 | Surfrider Foundation | PO BOX 6010, San Clemente, CA 92674-6010 | CA | 1990-04 | $6,445,070 |
| 6 | Wilderness Center Inc | PO BOX 202, Wilmot, OH 44689-0202 | OH | 1964-10 | $6,282,870 |
| 7 | Coastal America Foundation Inc | 100 Muron Ave, Bellingham, MA 02019-2112 | MA | 1998-04 | $602,243 |
| 8 | South Shore Natural Science Center Inc | PO BOX 429, Norwell, MA 02061-0429 | MA | 1995-02 | $575,414 |
| 9 | Thornton W Burgess Society Inc | 6 Discovery Hill Rd, East Sandwich, MA 02537-1316 | MA | 1976-01 | $569,618 |
| 10 | Johnny Appleseed Trail Association Inc | 860 South St, Fitchburg, MA 01420-6903 | MA | 1999-10 | $542,216 |
| 11 | Mystic River Watershed Association Inc | 20 Academy Road, Arlington, MA 02476-6401 | MA | 1976-03 | $499,098 |
| 12 | Native Ecology Iniative Inc | PO BOX 470829, Brookline Vlg, MA 02447-0829 | MA | 2000-03 | $217,580 |
| 13 | Bolton Conservation Trust Inc | PO BOX 14, Bolton, MA 01740-0014 | MA | 1975-06 | $110,235 |
| 14 | Sunbow 5 Foundation Inc | 35 Huntington Rd, Hadley, MA 01035-9601 | MA | 1990-08 | $46,307 |
| 15 | Institute For Environmental Awareness Inc | 39 Glasheen Rd, Petersham, MA 01366-9715 | MA | 1973-12 | $40,779 |
| 16 | Cape Outdoor Discovery Inc | 84 Antone Ave, East Falmouth, MA 02536-4904 | MA | 1989-11 | $30 |
| 17 | Northeast Business Environmental Network Inc | 49 Junction Square Dr, Concord, MA 01742-3049 | MA | 1995-05 | $0 |
| 18 | Solar Now Incorporated | 100 Sohier Road, Beverly, MA 01915 | MA | 1998-09 | $0 |
| 19 | Sustainable Step New England | 70 Lynde Street, Melrose, MA 02176 | MA | 2000-01 | $0 |
| 20 | Wild Again Inc | 25 Tami Ct, Bridgewater, MA 02324-1236 | MA | 1991-02 | $0 |
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