Edgar Filing: SERVICESOURCE INTERNATIONAL, INC.

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Schedule 13G

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1 (b), (c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2 (b)

(Amendment No. 1)*

ServiceSource International, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

81763U100

(CUSIP Number)

December 31, 2012

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

(Continued on following pages)

Page 1 of 18 Pages

Exhibit Index Contained on Page 17

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Page 2 of 18

1	NAME OF REPORTING PERSON Benchmark Capital Partners V, L.P. (“BCP V”)
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER 5,624,220 shares, except that Benchmark Capital Management Co. V, L.L.C. (“BCMC V”), the general partner of BCP V, may be deemed to have sole power to vote these shares, and Alexandre Balkanski (“Balkanski”), Bruce W. Dunlevie (“Dunlevie”), Peter Fenton (“Fenton”), J. William Gurley (“Gurley”), Kevin R. Harvey (“Harvey”), Robert C. Kagle (“Kagle”) and Steven M. Spurlock (“Spurlock”), the members of BCMC V, may be deemed to have shared power to vote these shares.
	6	SHARED VOTING POWER See response to row 5.
	7	SOLE DISPOSITIVE POWER 5,624,220 shares, except that BCMC V, the general partner of BCP V, may be deemed to have sole power to dispose of these shares, and Balkanski, Dunlevie, Fenton, Gurley, Harvey, Kagle and Spurlock, the members of BCMC V, may be deemed to have shared power to dispose of these shares.
	8	SHARED DISPOSITIVE POWER See response to row 7.

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON	5,624,220
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9	7.4%
12	TYPE OF REPORTING PERSON	PN

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1	NAME OF REPORTING PERSON Benchmark Founders’ Fund V, L.P. (“BFF V”)
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER 685,745 shares, except that BCMC V, the general partner of BFF V, may be deemed to have sole power to vote these shares, and Balkanski, Dunlevie, Fenton, Gurley, Harvey, Kagle and Spurlock, the members of BCMC V, may be deemed to have shared power to vote these shares.
	6	SHARED VOTING POWER See response to row 5.
	7	SOLE DISPOSITIVE POWER 685,745 shares, except that BCMC V, the general partner of BFF V, may be deemed to have sole power to dispose of these shares, and Balkanski, Dunlevie, Fenton, Gurley, Harvey, Kagle and Spurlock, the members of BCMC V, may be deemed to have shared power to dispose of these shares.
	8	SHARED DISPOSITIVE POWER See response to row 7.

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON	685,745
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9	1.0%
12	TYPE OF REPORTING PERSON	PN

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1	NAME OF REPORTING PERSON Benchmark Founders’ Fund V-A, L.P. (“BFF V-A”)
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER 131,295 shares, except that BCMC V, the general partner of BFF V-A, may be deemed to have sole power to vote these shares, and Balkanski, Dunlevie, Fenton, Gurley, Harvey, Kagle and Spurlock, the members of BCMC V, may be deemed to have shared power to vote these shares.
	6	SHARED VOTING POWER See response to row 5.
	7	SOLE DISPOSITIVE POWER 131,295 shares, except that BCMC V, the general partner of BFF V-A, may be deemed to have sole power to dispose of these shares, and Balkanski, Dunlevie, Fenton, Gurley, Harvey, Kagle and Spurlock, the members of BCMC V, may be deemed to have shared power to dispose of these shares.
	8	SHARED DISPOSITIVE POWER See response to row 7.

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON	131,295
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9	0.2%
12	TYPE OF REPORTING PERSON	PN

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1	NAME OF REPORTING PERSON Benchmark Founders’ Fund V-B, L.P. (“BFF V-B”)
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER 103,314 shares, except that BCMC V, the general partner of BFF V-B, may be deemed to have sole power to vote these shares, and Balkanski, Dunlevie, Fenton, Gurley, Harvey, Kagle and Spurlock, the members of BCMC V, may be deemed to have shared power to vote these shares.
	6	SHARED VOTING POWER See response to row 5.
	7	SOLE DISPOSITIVE POWER 103,314 shares, except that BCMC V, the general partner of BFF V-B, may be deemed to have sole power to dispose of these shares, and Balkanski, Dunlevie, Fenton, Gurley, Harvey, Kagle and Spurlock, the members of BCMC V, may be deemed to have shared power to dispose of these shares.
	8	SHARED DISPOSITIVE POWER See response to row 7.

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON	103,314
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9	0.1%
12	TYPE OF REPORTING PERSON	PN

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1	NAME OF REPORTING PERSON Benchmark Capital Management Co. V, L.L.C.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER 7,350,740 shares, of which 5,624,220 are directly owned by BCP V, 685,745 are directly owned by BFF V, 131,295 are directly owned by BFF V-A, 103,314 are directly owned by BFF V-B and 806,166 are held in nominee form for the benefit of persons associated with BCMC V. BCMC V, the general partner of BCP V, BFF V, BFF V-A and BFF V-B, may be deemed to have sole power to vote these shares, and Balkanski, Dunlevie, Fenton, Gurley, Harvey, Kagle and Spurlock, the members of BCMC V, may be deemed to have shared power to vote these shares.
	6	SHARED VOTING POWER See response to row 5.
	7	SOLE DISPOSITIVE POWER 7,350,740 shares, of which 5,624,220 are directly owned by BCP V, 685,745 are directly owned by BFF V, 131,295 are directly owned by BFF V-A, 103,314 are directly owned by BFF V-B and 806,166 are held in nominee form for the benefit of persons associated with BCMC V. BCMC V, the general partner of BCP V, BFF V, BFF V-A and BFF V-B, may be deemed to have sole power to dispose of these shares, and Balkanski, Dunlevie, Fenton, Gurley, Harvey, Kagle and Spurlock, the members of BCMC V, may be deemed to have shared power to dispose of these shares.
	8	SHARED DISPOSITIVE POWER See response to row 7.

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON	7,350,740
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9	9.7%
12	TYPE OF REPORTING PERSON	OO

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1	NAME OF REPORTING PERSON Alexandre Balkanski
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER 0 shares
	6	SHARED VOTING POWER 7,350,740 shares, of which 5,624,220 are directly owned by BCP V, 685,745 are directly owned by BFF V, 131,295 are directly owned by BFF V-A, 103,314 are directly owned by BFF V-B and 806,166 are held in nominee form for the benefit of persons associated with BCMC V. BCMC V is the general partner of BCP V, BFF V, BFF V-A and BFF V-B, and Balkanski, a member of BCMC V, may be deemed to have shared power to vote these shares.
	7	SOLE DISPOSITIVE POWER 0 shares
	8	SHARED DISPOSITIVE POWER 7,350,740 shares, of which 5,624,220 are directly owned by BCP V, 685,745 are directly owned by BFF V, 131,295 are directly owned by BFF V-A, 103,314 are directly owned by BFF V-B and 806,166 are held in nominee form for the benefit of persons associated with BCMC V. BCMC V is the general partner of BCP V, BFF V, BFF V-A and BFF V-B, and Balkanski, a member of BCMC V, may be deemed to have shared power to have shared power to dispose of these shares.

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON	7,350,740
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9	9.7%
12	TYPE OF REPORTING PERSON	IN

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1	NAME OF REPORTING PERSON Bruce W. Dunlevie
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen

NUMBER OF	5	SOLE VOTING POWER 0 shares
SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	6	SHARED VOTING POWER 7,350,740 shares, of which 5,624,220 are directly owned by BCP V, 685,745 are directly owned by BFF V, 131,295 are directly owned by BFF V-A, 103,314 are directly owned by BFF V-B and 806,166 are held in nominee form for the benefit of persons associated with BCMC V. BCMC V is the general partner of BCP V, BFF V, BFF V-A and BFF V-B, and Dunlevie, a member of BCMC V, may be deemed to have shared power to vote these shares.
	7	SOLE DISPOSITIVE POWER 0 shares
	8	SHARED DISPOSITIVE POWER 7,350,740 shares, of which 5,624,220 are directly owned by BCP V, 685,745 are directly owned by BFF V, 131,295 are directly owned by BFF V-A, 103,314 are directly owned by BFF V-B and 806,166 are held in nominee form for the benefit of persons associated with BCMC V. BCMC V is the general partner of BCP V, BFF V, BFF V-A and BFF V-B, and Dunlevie, a member of BCMC V, may be deemed to have shared power to dispose of these shares.

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON	7,350,740
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9	9.7%
12	TYPE OF REPORTING PERSON	IN

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1	NAME OF REPORTING PERSON Peter Fenton
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen

NUMBER OF	5	SOLE VOTING POWER 0 shares
SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	6	SHARED VOTING POWER 7,350,740 shares, of which 5,624,220 are directly owned by BCP V, 685,745 are directly owned by BFF V, 131,295 are directly owned by BFF V-A, 103,314 are directly owned by BFF V-B and 806,166 are held in nominee form for the benefit of persons associated with BCMC V. BCMC V is the general partner of BCP V, BFF V, BFF V-A and BFF V-B, and Fenton, a member of BCMC V, may be deemed to have shared power to vote these shares.
	7	SOLE DISPOSITIVE POWER 0 shares
	8	SHARED DISPOSITIVE POWER 7,350,740 shares, of which 5,624,220 are directly owned by BCP V, 685,745 are directly owned by BFF V, 131,295 are directly owned by BFF V-A, 103,314 are directly owned by BFF V-B and 806,166 are held in nominee form for the benefit of persons associated with BCMC V. BCMC V is the general partner of BCP V, BFF V, BFF V-A and BFF V-B, and Fenton, a member of BCMC V, may be deemed to have shared power to dispose of these shares.

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON	7,350,740
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	£
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9	9.7%
12	TYPE OF REPORTING PERSON	IN

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1	NAME OF REPORTING PERSON J. William Gurley
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen

NUMBER OF	5	SOLE VOTING POWER 0 shares
SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	6	SHARED VOTING POWER 7,350,740 shares, of which 5,624,220 are directly owned by BCP V, 685,745 are directly owned by BFF V, 131,295 are directly owned by BFF V-A, 103,314 are directly owned by BFF V-B and 806,166 are held in nominee form for the benefit of persons associated with BCMC V. BCMC V is the general partner of BCP V, BFF V, BFF V-A and BFF V-B, and Gurley, a member of BCMC V, may be deemed to have shared power to vote these shares.
	7	SOLE DISPOSITIVE POWER 0 shares
	8	SHARED DISPOSITIVE POWER 7,350,740 shares, of which 5,624,220 are directly owned by BCP V, 685,745 are directly owned by BFF V, 131,295 are directly owned by BFF V-A, 103,314 are directly owned by BFF V-B and 806,166 are held in nominee form for the benefit of persons associated with BCMC V. BCMC V is the general partner of BCP V, BFF V, BFF V-A and BFF V-B, and Gurley, a member of BCMC V, may be deemed to have shared power to dispose of these shares.

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON	7,350,740
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9	9.7%
12	TYPE OF REPORTING PERSON	IN

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1	NAME OF REPORTING PERSON Kevin R. Harvey
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen

NUMBER OF	5	SOLE VOTING POWER 0 shares
SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	6	SHARED VOTING POWER 7,350,740 shares, of which 5,624,220 are directly owned by BCP V, 685,745 are directly owned by BFF V, 131,295 are directly owned by BFF V-A, 103,314 are directly owned by BFF V-B and 806,166 are held in nominee form for the benefit of persons associated with BCMC V. BCMC V is the general partner of BCP V, BFF V, BFF V-A and BFF V-B, and Harvey, a member of BCMC V, may be deemed to have shared power to vote these shares.
	7	SOLE DISPOSITIVE POWER 0 shares
	8	SHARED DISPOSITIVE POWER 7,350,740 shares, of which 5,624,220 are directly owned by BCP V, 685,745 are directly owned by BFF V, 131,295 are directly owned by BFF V-A, 103,314 are directly owned by BFF V-B and 806,166 are held in nominee form for the benefit of persons associated with BCMC V. BCMC V is the general partner of BCP V, BFF V, BFF V-A and BFF V-B, and Harvey, a member of BCMC V, may be deemed to have shared power to dispose of these shares.

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON	7,350,740
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	£
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9	9.7%
12	TYPE OF REPORTING PERSON	IN

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1	NAME OF REPORTING PERSON Robert C. Kagle
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen

NUMBER OF	5	SOLE VOTING POWER 0 shares
SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	6	SHARED VOTING POWER 7,350,740 shares, of which 5,624,220 are directly owned by BCP V, 685,745 are directly owned by BFF V, 131,295 are directly owned by BFF V-A, 103,314 are directly owned by BFF V-B and 806,166 are held in nominee form for the benefit of persons associated with BCMC V. BCMC V is the general partner of BCP V, BFF V, BFF V-A and BFF V-B, and Kagle, a member of BCMC V, may be deemed to have shared power to vote these shares.
	7	SOLE DISPOSITIVE POWER 0 shares
	8	SHARED DISPOSITIVE POWER 7,350,740 shares, of which 5,624,220 are directly owned by BCP V, 685,745 are directly owned by BFF V, 131,295 are directly owned by BFF V-A, 103,314 are directly owned by BFF V-B and 806,166 are held in nominee form for the benefit of persons associated with BCMC V. BCMC V is the general partner of BCP V, BFF V, BFF V-A and BFF V-B, and Kagle, a member of BCMC V, may be deemed to have shared power to dispose of these shares.

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON	7,350,740
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9	9.7%
12	TYPE OF REPORTING PERSON	IN

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1	NAME OF REPORTING PERSON Steven M. Spurlock
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen

NUMBER OF	5	SOLE VOTING POWER 0 shares
SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	6	SHARED VOTING POWER 7,350,740 shares, of which 5,624,220 are directly owned by BCP V, 685,745 are directly owned by BFF V, 131,295 are directly owned by BFF V-A, 103,314 are directly owned by BFF V-B and 806,166 are held in nominee form for the benefit of persons associated with BCMC V. BCMC V is the general partner of BCP V, BFF V, BFF V-A and BFF V-B, and Spurlock, a member of BCMC V, may be deemed to have shared power to vote these shares.
	7	SOLE DISPOSITIVE POWER 0 shares
	8	SHARED DISPOSITIVE POWER 7,350,740 shares, of which 5,624,220 are directly owned by BCP V, 685,745 are directly owned by BFF V, 131,295 are directly owned by BFF V-A, 103,314 are directly owned by BFF V-B and 806,166 are held in nominee form for the benefit of persons associated with BCMC V. BCMC V is the general partner of BCP V, BFF V, BFF V-A and BFF V-B, and Spurlock, a member of BCMC V, may be deemed to have shared power to dispose of these shares.

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON	7,350,740
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9	9.7%
12	TYPE OF REPORTING PERSON	IN

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This Amendment No. 1 amends and restates in its entirety the Schedule 13G previously filed by Benchmark Capital Partners V, L.P., a Delaware limited partnership (“BCP V”), Benchmark Founders’ Fund V, L.P., a Delaware limited partnership (“BFF V”), Benchmark Founders’ Fund V-A, L.P., a Delaware limited partnership (“BFF V-A”), Benchmark Founders’ Fund V-B, L.P., a Delaware limited partnership (“BFF V-B”), Benchmark Capital Management Co. V, L.L.C., a Delaware limited liability company (“BCMC V”), and Alexandre Balkanski (“Balkanski”), Bruce W. Dunlevie (“Dunlevie”), Peter Fenton (“Fenton”), J. William Gurley (“Gurley”), Kevin R. Harvey (“Harvey”), Robert C. Kagle (“Kagle”) and Steven M. Spurlock (“Spurlock”) (together will all prior and current amendments thereto, this “Schedule 13G”).

ITEM 1(A).

NAME OF ISSUER

ServiceSource International, Inc.

ITEM 1(B).

ADDRESS OF ISSUER’S PRINCIPAL EXECUTIVE OFFICES

634 2^nd Street

San Francisco, CA 94107

ITEM 2(A).

NAME OF PERSONS FILING

This Statement is filed by BCP V, BFF V, BFF V-A, BFF V-B, BCMC V, Balkanski, Dunlevie, Fenton, Gurley, Harvey, Kagle and Spurlock. The foregoing entities and individuals are collectively referred to as the “Reporting Persons.”

BCMC V, the general partner of BCP V, BFF V, BFF V-A and BFF V-B, may be deemed to have sole power to vote and sole power to dispose of shares of the issuer directly owned by BCP V, BFF V, BFF V-A and BFF V-B. Balkanski, Dunlevie, Fenton, Gurley, Harvey, Kagle and Spurlock are members of BCMC V and may be deemed to have shared power to vote and shared power to dispose of shares of the issuer directly owned by BCP V, BFF V, BFF V-A and BFF V-B.

ITEM 2(B).

ADDRESS OF PRINCIPAL BUSINESS OFFICE

The address for each reporting person is:

Benchmark Capital

2480 Sand Hill Road, Suite 200

Menlo Park, California 94025

ITEM 2(C).

CITIZENSHIP

BCP V, BFF V, BFF V-A and BFF V-B are Delaware limited partnerships. BCMC V is a Delaware limited liability company. Balkanski, Dunlevie, Fenton, Gurley, Harvey, Kagle and Spurlock are United States Citizens.

ITEM 2 (D) and (E).

TITLE OF CLASS OF SECURITIES AND CUSIP NUMBER

Common Stock

CUSIP # 81763U100

ITEM 3.

Not Applicable.

ITEM 4.

OWNERSHIP

Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.

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(a)

Amount beneficially owned:

See Row 9 of cover page for each Reporting Person.

(b)

Percent of Class:

See Row 11 of cover page for each Reporting Person.

(c)

Number of shares as to which such person has:

(i)

Sole power to vote or to direct the vote:

See Row 5 of cover page for each Reporting Person.

(ii)

Shared power to vote or to direct the vote:

See Row 6 of cover page for each Reporting Person.

(iii)

Sole power to dispose or to direct the disposition of:

See Row 7 of cover page for each Reporting Person.

(iv)

Shared power to dispose or to direct the disposition of:

See Row 8 of cover page for each Reporting Person.

ITEM 5.

OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS

Not applicable.

ITEM 6.

OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON

Under certain circumstances set forth in the limited partnership agreements of BCP V, BFF V, BFF V-A and BFF V-B, and the limited liability company agreement of BCMC V, the general and limited partners or members, as the case may be, of each of such entities may be deemed to have the right to receive dividends from, or the proceeds from, the sale of shares of the issuer owned by each such entity of which they are a partner or member, as the case may be.

ITEM 7.

IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY

Not applicable.

ITEM 8.

IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP

Not applicable.

ITEM 9.

NOTICE OF DISSOLUTION OF GROUP

Not applicable.

ITEM 10.

CERTIFICATION

Not applicable.

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SIGNATURES

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Date: February 13, 2013

	BENCHMARK CAPITAL PARTNERS V, L.P., a Delaware Limited Partnership

	BENCHMARK FOUNDERS’ FUND V, L.P., a Delaware Limited Partnership

	BENCHMARK FOUNDERS’ FUND V-A, L.P., a Delaware Limited Partnership

	BENCHMARK FOUNDERS’ FUND V-B, L.P., a Delaware Limited Partnership

	BENCHMARK CAPITAL MANAGEMENT CO. V, L.L.C., a Delaware Limited Liability Company

	By:	/s/ Steven M. Spurlock
		Steven M. Spurlock
		Managing Member

	ALEXANDRE BALKANSKI
	BRUCE W. DUNLEVIE
	PETER FENTON
	J. WILLIAM GURLEY
	KEVIN R. HARVEY
	ROBERT C. KAGLE
	STEVEN M. SPURLOCK

	By:	/s/ Steven M. Spurlock
		Steven M. Spurlock
		Attorney-in-Fact*

*Signed pursuant to a Power of Attorney already on file with the appropriate agencies.

CUSIP NO. 81763U100

13 G

Page 17 of 18

EXHIBIT INDEX


		Found on Sequentially
Exhibit		Numbered Page

Exhibit A: Agreement of Joint Filing		18

CUSIP NO. 81763U100

13 G

Page 18 of 18

exhibit A

Agreement of Joint Filing

The Reporting Persons agree that a single Schedule 13G (or any amendment thereto) relating to the Common Stock of ServiceSource International, Inc. shall be filed on behalf of each of the Reporting Persons. Note that copies of the applicable Agreement of Joint Filings are already on file with the appropriate agencies.